The primer mix is intended to detonate when sheared between the cup and the anvil by the primer strike. Double action means that pulling the trigger performs two actions: (1) it cocks or finishes cocking the spring responsible for . I then removed them from the water and let them air dry for about a week. Weak hammer spring = weak primer hits and vice-versa. most has been covered. . U.S. Military. . Joined: Apr 2006 Do not let the hammer fall on an ar15 when the upper is not mated to the lower!! The 6.5 CM in Ar's has always had a Primer puncturing issue & is why some use small Primer pocket Brass & small Primers for reloading ,also for longer Brass service life.The HP Bolt helps but not with all loadings . Flattened primers; This is commonly cited as the thing to look for but it is not an absolute. 3) When your brass lands forward of 3:00 it is often an indication that the brass is bouncing off of the deflector or the like which sends the brass forward landing at 2:00. AR-15-style rifles can be modified, as the gun used in the Aurora shooting was, to use a magazine that holds as many as 100 bullets. The firing pin channel will accept a .17 HMR brush for anyone who is as insane as I am when it comes to cleaning. Others have rounded edges, and leave a softer dent. they found out that a 55-grain titanium firing pin allows for reliable primer detonation and eliminates the primer denting or unintentional discharge caused by the inertia. The firing pin in an AR15 is free floating inside its chamber. Using what's probably the weakest commercial 10mm ammo available (Prvi Partizan 180gr JHP), my spent brass is ejecting anywhere from 12.5 feet (with the EGW stop, beveled but untapered, with the 21# mainspring) up to 17.5 feet (with the EGW stop, beveled and tapered, with the 21# mainspring). In a couple decades it made muzzleloading and breechloading single-shot rifles entirely obsolete, and it has been touted as "the gun that won the West" ever since the Indian Wars. This is never enough force to cause a slam fire in an AR15 though. Often the shooter gets a face full of gas and small particles or oil from the bolt itself. I am set on Gas Port #1. #1. you can move the gas block out 2 inches and rechamber to a std length..so do 26 then 24. a gas valve/adjustable block/ weighted carrier/trimmed ejector spring will help save the brass. 10K of 9mm would also be a pile :biglaugh: NRA Life Member Save Reply M mikeg1005 Banned Joined Dec 3, 2009 If you let the hammer fall it can strike the boltcatch damaging your boltcatch or possibly your lower TZapp said: Take the upper off of the lower and try to fire it and watch to see if the hammer is dropping. With its steel casing, this cartridge costs only a fraction of what a brass cased one would. The 7.62x51mm NATO round is the lower pressure version of the .308 Winchester. Bright rings around the base of the case about 0.4 to 0.6 inches up from the rim can indicate potential case separation. The force firing pins put on bottleneck cartridges is enough to set case shoulders back .001" or more before the round fires. Went to try 115 gr fmj. The GunSmith says the Bolt is opening too soon causing Primers to blow. The barrel shank diameter is .666-inch and the bore diameter is .224-inch. In the below-embedded video, you can see how deeply the old heavy firing pin dents the primer upon merely releasing the . The primer mix, called a pellet, may have been cracked and moved out of the way from between the cup and the anvil. AR-15; AK-47 / AK-74 / Everything AK; Shotguns; . #824370 04/15/06824370 04/15/06. First and foremost, striker fired vs. hammer fired is totally distinct from double action vs. single action, DA/SA, SAO, DAO, etc. The case neck is often work hardened due to sizing and expansion during firing, leaving the shoulder and case body relatively soft and in some cases (pardon the pun) vulnerable to pressure deformities from gas blow by from the unsealed neck. A lot of weapons that function really well and have for a really long time. Additionally, the firing pin strike mark on many primers seems to be oblong instead of round. A malfunction is something that you can apply a corrective set of actions and get the AR firing again, at least for one more shot. As described above, a poor firing pin fitment to the bolt face can cause it on its own. There's a noticeable but shallow dent in the primer. Messages 13,816 Reaction score . Re: Building a precision AR-10: Questions about barrel, bolt, twist, etc. Centerfire. It sounds more like you have a problem with the firearm rather than the round itself. In life, strive to take the high road..It offers a better field of fire. The M1 Garand was, in no small part responsible for victory in WWII and as such, was a great rifle. I haven't tried that however-just speculation. The tell-tale sign of a dangerous primer crater is very jagged edges on the crater rim. Fire a round, then unload the gun. Should I get Extra Heavy Buffer for this Rifle? In the striker's case, there is no hammer, so the firing pin's energy comes entirely from the spring in the recess at the rear of the striker. Rechambered to 6 Dasher. G17 G26 G30 G36 RG Ind. Went to try it out today and after 2-3 shots, I closed the bolt and it fired the round (no my finger wasn't on the trigger). When they get a bad batch they pull the whole lot down weighing 10-15 and get the amount "Average" only is off a little. Shooting the AR180B at the range is very similar to firing an AR-15, with a few minor differences. TnTnTn 22 Revolver Walther P22 Springfield 1911 Rock River AR-15. I asked him to break down his AR, and let me look at his BCG. If you are bump firing you may be releasing the hammer before the bolt is locked. Failure to Feed What's really annoying is that it can happen at any time. Dec 9, 2017 #8 Uzi.308 Win. The pin should pop out and retract when you stop pushing on the hammer. Sizing such brass can be done,trimming will be required, but the generous chamber means a case head separation will be sooner than rifle fired ammo. Part 7: Repriming the Cartridge Case Part 8: Powder, Propellants, and Pressure Part 9: All About Primers Part 10: Projectiles: Materials, Weights, and Styles Part 11: Seating and Crimping Bullets So, let's discuss the topic of seating and crimping in the reloading process. The case crease marks are orientated to the . https://www.tngun.com/ar-15-style-rifle-safety-tip/ http://www.amazon.com/Understanding-Handguns-Self-Defense-David-Nash/dp/1608850250/Sheschinc-20 Today I . AR15 , (not going to mention make) A colleague has had what I think is a slam fire, he`s vague about how it happened , he says he put the mag in and pressed the bolt release , boom, it fired out of battery and blown the plastic mag out and smashed it , he said "I think it was the Hornady 55gr training ammo I have but it . Loaded 40 test rounds for 7mm Remington Mag. I've re-run the ammo in other guns and it's gone bang so we are thinking primers are the issue. Pull down a whole batch of Rifle at 50 grains and ya got some powder sitting there. Jun 11, 2009. It looks like the bullet jumped while in contact with the firing pin. unless the rounds have really hard primers. If the movement of the firing pin is mitigated by the spring, then it shouldn't react the same way. Failure to do so will result with your new account denied. Jeremy S. for TTAG. Both hammers and strikers offer all of these forms of operation. Here's one way to spend the day removing a stuck case from an AR-10 build. I am shooting a Ruger SR762 with a Suppressor that is Jamming and blowing Primers. On the converse side, you'll hear many say that this is just flat out untrue. I just can't fathom how one empty machined piece of aluminum is worth 10x+ more than another. Reactions: maconbacon. I own a bunch of AR's at different price points. The Rimfire Report: Dry Firing Your Rimfire. We do not ban legit Internet Service Providers from the USA (exception for certain individual IP addresses). Unloaded the rounds and looked at them under magnifier the anvil was still there but 5 of the 9 you could put a toothpick down one side of the anvil past where the charge would go. Free VPN's tend to get banned too. I've been in the gun world for a while. I had some misfiring problems where the rifle was denting the primer making a small indentation in it with the round not firing then locking the bolt shut where it was quite difficult to get the round out. 1.The shock from dry firing can peen the inside of the bolt causing to pin to protrude to far out and pierce a primer which is dangerous. The casing is coated in PolyFormance, a proprietary treatment that eases feeding and extraction in a semi-automatic without leaving behind an abundance of . Blew torn apart brass out the ejection port and the mag out of the bottom. Gun shoots fine without the Suppressor. The 600-yard target has an X-Ring 6 inches (1 MOA) across, while the 10-Ring spans 12 inches (2 MOA). If the ammo works in other guns, why would you think the ammo is at fault rather than the first gun? . If thats the case what LPK did you use? When the bolt slams into battery on a fresh cartridge in the chamber, the inertia pushes the firing pin forward enough to bump the primer and leave a mark. No more hours of trimming and sizing, thanks to the steps Starline takes to ensure the rifle brass is correct when it leaves the factory. The lower has nothing to do with primer denting, make sure your hammer is staying locked back in the trigger pack after the carrier passes . Had Kevin Rayhill install a new, stiffer firing pin spring. Just took my rifle to the gun smith and he said my buffer is a AR 15 buffer and too light. That clearance means nothing for firing pin tips that usually stick out at least .060" past the bolt face and most primers need dents at least .020" deep to fire. Alliant Powder® Smokeless Powders. I find this a little confusing. Starline Brass prides itself on producing the highest quality brass case available. Subtracting the inside diameter from the outside diameter gives .442-inch. I once soaked several large rifle primers in water for about a week with no real agitation. Failure to Feed (FTF) Failure to feed (FTF) is one of the most common malfunctions you'll encounter as a gun owner. use your off hand to ease it down while pulling the trigger. With the bolt out of the gun I measure .034" protrusion of the firing pin. The firing pin spring is there to retract the firing pin and so a stiffer spring would exacerbate the issue if that were the case. ago I chambered these two but did not fire. Machine guns have generous chambers even by M1A standards. The following article is about reloading for NRA/CMP Highpower Rifle competition and is geared toward competitors shooting the AR15 Service Rifle. New .222 cases are $30/100 which means $300 just for cases to make up 1000 loaded rds. This is when the primer inside the shell is lightly struck by the firing pin without being hard enough to ignite it. However, about 80% of my friends XD45 brass casings have 0.3 dents/creases running around the case. So I bought a R 25 2 years ago and changed my stock. Denting some primers, not igniting them.no other trigger/firing problems. Starline Unprimed Rifle Brass. 3,570. This was on a Thursday, Friday went to range to break it in, well it broke during the first mag. Never been a fan of floating firing pins. Shoulder: The stepped, increased diameter from the nose of the pin to the body, or main bulk of that pin. It only takes a tiny difference in length on a firing pin to cause issues. It's easy to test the firing pin function on those guns. It was probably due to light primer strike. In the days before amateur, high-precision shooting from the bench, gun consumers weren . I've read about "enhanced" firing pins for the 7.62 AR. One common mistake is putting a rifle spring in a carbine or A4 buffer tube. Maryland. Oct 9, 2017. Does your firing pin tip protrude a little bit, even when it's locked back by the safety? So its denting the primer but not firing the round? If the primer is hit once and it does not go off due to insufficient firing-pin force, the sensitivity is further decreased. Winchester® Rifle Primers. Reply. G Mayay on November 14, 2021 at 6:53 pm. not so..i have three ar's built specifically for short range br. For example in the case of a Ruger 10/22, unless you keep a close watch on how many rounds . warning to NOT use their standard SR primers in .223/5.56x45 ammunition. Cases Dented by Sizing Lube Excessive application of sizing lube can cause divots in cases, particularly bottlenecked rifle cases. This tiny M1-style carbine weapon was designed to be amazingly rugged, especially considering how it was originally crafted for the whacking of sly coyotes on the open range. The forward inertia of the bolt upon chambering a round causes the firing pin to bounce forward with just enough force to leave a small mark on the primer. I don't worry about other primer types but in theory it could be an issue, as some are more sensitive than others, and the military spec primers are relatively insensitive. Federal® Centerfire Primers. I ran a box of flat nose federal coated 150 gr roundsall was fine. The guys who shoot .223's (5.56) out of an AR-15 with a brass deflector on the side of the upper receiver, will get a dent where the brass bounces off the deflector. The AR-15 is a civilian version of the military M-16 main battle rifle. Plus I imagine a titanium firing pin which is lighter/less mass would mark the primers less. #15 Edwardteach72.450/400 Nitro Ex. There are primers made with harder or thicker cups if you are a reloader. I had some misfiring problems where the rifle was denting the primer making a small indentation in it with the round not firing then locking the bolt shut where it was quite difficult to get the round out. Most of the LC, even the M118 LR is crimped primers so that is an extra headache. So I bought a R 25 2 years ago and changed my stock. 10K of 9mm would also be a pile :biglaugh: I think the AR15 design is drop safe when used with GI type firing pins and ammo with military spec primers. 12. Perhaps I'm not interpreting this correctly, but if some rounds do not discharge the first time but will if fired again, usually means that the firing pin isn't denting the primer enough for the round to go off. Say 49-50 grains so the Average it out to 49.5 and reload them all. Background. The stock is . Before reloading, turn each case in your fingers and examine it carefully, searching for cracks. 8 Common AR-15 Failures 1. This will not work correctly with a barrel that is headspaced for a standard AR .30 cal bolt (.454 bolt depth, and .136 diameter). IMR Smokeless Powder - Rifle. Compared to a Mossberg 500, for example, the gun is head-and-shoulders above the competition. Federal 205 and 205M use 0.0225" cups. A lot of weapons that function really well and have for a really long time. some kind of cumulative denting on the primer might have occurred. Same deal on all the ammo I brought. The Collector. Primer Flattening Posted February 16, 2016. Spring Recess: The hollow portion of the striker's body that holds the firing pin spring. Rifle started as 6BR with SSS Competition trigger.no trigger/firing problems. Oct 8, 2020. . Then, go pick up the fired case, drop it in the chamber, and then slam the bolt carrier down on it like it was a hot round. Just took my rifle to the gun smith and he said my buffer is a AR 15 buffer and too light. Seems he was having problems with his Shrubmaster Ar-15, firing pin not hitting the primer. Ok. Let's trigger some people. Yep 5 of 15 failed to fire, on inspecting them it showed light primer strikes on the one that failed to fire, barley denting the primer. Feb 12, 2019. This is what. So it changes the game a bit as there is a lot more going in the AR than just closing the bolt, firing a round, then ejecting . I found 1 5.56 in the bottom of my range box. I'm not talking optics, triggers, bcg's here. I own a bunch of AR's at different price points. I've been in the gun world for a while. February 25, 2019 By Joseph von Benedikt. Winchester® Smokeless Ball Powder. If that's not the problem, then check the buffer. Running the suggested heavy buffer for 9mm and spring set up for it. It's the same Rem 870 we've come to know and love, and it feels as solid as ever. As stated above, many have heard the advice that you should never dry fire a rimfire gun lest you risk damaging the firing pin. 3 min. Say 49-50 grains so the Average it out to 49.5 and reload them all. AR stands for "ArmaLite rifle," after the company the . SS dry firing rimfires can peen the side of the chamber wall causing the round to not load or get stuck after firing. Dimpled primers always creep me out. If you run into a IP ban afterwards as a member, again - turn off your VPN or switch servers. I probably just need to scale back and buy and load 200 cases at a time until I get to that magic 1000 rd stockpile I have in my head. I just can't fathom how one empty machined piece of aluminum is worth 10x+ more than another. I'm not talking optics, triggers, bcg's here. #1. Messages 2,868 Reaction score . The AR-15 platform uses a free floating firing pin, and it's my understanding that the PTR-91 does not. However, if your rifle does not crater primers on normal loads, and then begins cratering, you can be fairly certain it is being created by over-pressure. __________________ Please, calm down. BUT without the force of the hammer behind it, the firing pin alone doesn't have nearly enough mass to ignite the primer just from the bolt closing. custom mauser wont shoot, suggestions? On the ones that did fire it showed a light strike with . I am absurdly meticulous when it comes to cleaning the bolt. No known slam fires out of this gun. There are five types of AR-15 malfunctions that can occur. I told him to follow me down to the range, and that I was here to sight in a 308, but might have an extra 5.56 round or 2 in my range box. # 3 12-11-2006, 4:28 PM This 223 Rem ammo by Wolf helps to take some of the sting out of what can be so costly a pastime. Sep 22, 2020. Posts. It doesn't get much more American than the old Ruger Ranch Rifle: the Mini-14. The AR is made to not fire out of battery so the hammer is not even hitting the firing pin. Some reflectors have sharp edges, and leave a sharp dent. Save Share. B. . This article notes numerous documented primer punctures with standard SR primers in AR15 rifles and quotes companies such as Speer/CCI, Remington, etc. This has resulted in causing FTF apparently. Rod: Yes it's denting the primers but not going bang. Two are common, a couple will crop up every once in a while, and the last, or Type V, you rarely see. Not even a hint of a dented primer from the firing pin. Over all, Federal primers were the softest and Winchester the hardest with Remington and CCI very similar. Case dimensions are virtually identical. Answer (1 of 7): Yes. Pull charging handle, round chambers. No ignition. History first. Then, when you put the gun up against some competition, and you start to realize just how good you have it. During Wednesday's edition of ABC's ignorant liberal hate-fest, "The View," Whoopi Goldberg said people who own AR-15s should be reported to police and thrown in jail. My thinking it is an ejection mark. It did not, however, have a long service history. You can safely fire 7.62x51mm NATO specification ammunition, marked with a cross in a circle on the casehead, in any .308 Winchester chamber. It is the hammer spring that influences the strike of the firing pin on the primer. What's the difference? That means you don't have to be picky on primers and only choose the hard military ones for reloading, because the spring will keep that firing pin from denting primers significantly when the bolt slams forward on a fresh round. Winchester® #209 777 Primers - 100-Pack. The 6.5 Grendel unprimed brass is very consistent and will make reloading a simple and easy task. This will not work correctly with a barrel that is headspaced for a standard AR .30 cal bolt (.454 bolt depth, and .136 diameter). I was planning on using 50gr SP Varmit Nightmare bullets and working up a load using H-335. Beginning with a 1/4-inch twist drill, with the cutting tip ground at a 135 degree included angle, a starter hole was cut to a depth of .125-inch at the punch mark. Ok. Let's trigger some people. recently bought a NIB Ruger Security 9. 3) When your brass lands forward of 3:00 it is often an indication that the brass is bouncing off of the deflector or the like which sends the brass forward landing at 2:00. It occurs when a round fails to load into the chamber of an AR from the magazine. If the rounds are firing but its not picking up a new round it could be due to the ammo you are using. Took my M5E1 build (all Aero parts unless otherwise specified) out yesterday for the first time: matched M5E1 ODG cerakote receivers with 15" M-Lok hand guard, 16" QPQ barrel, low pro GB, melonite gas tube, LPK, nitride BCG, A2 flash hider, carbine buffer kit, Troy BUIS, Magpul CTR/MOE grip/AFG, and some Ergo rail . Just one more tidbit. Keep in mind this doesn't count for jams or breakage. 1st rebound went fine then 2nd round fired double with the 2nd round being out of battery. CCI® Primers - Per 1000. I will make a video of it denting the primer on a round and then remove the bolt and mail it to anyone who doesnt believe its clean. More concerned with AR lightly denting primer upon chambering. None. 455. In the late 1800s, the lever action was the AR-15 of its day: easy to load, fast to shoot, and sporting plenty of firepower. Pre-Ban vs. Post-Ban. Sunday Gunday: AR Service Rifle — Focus on Ammo & Reloading. Winchester® #209 Primers for Shotshells. This rifle is destined to be one of the great rifles of all time. Even if a powder charge reduction does cure the piercing problem, I would still look at the firing pin to make sure you do not have excessive denting of the primer (that could cause ignition) at bolt closure. 2.It can break the pin. The primer marking is generally considered to not be much of a problem however it is a little troubling. Stated simply, the seating step simply means jamming a new bullet into a cleaned, resized, primed, and powder-charged . Turn off any VPN/safe-browsing feature. The slam fire can be caused by a high primer or by a heavy, unsprung firing pin. Hodgdon® Smokeless Powder. Radway is known to be underpowered and may not be cycling the bolt. 9 out of the rounds did not fire, primer dented but no powder ignition. Rimfires. Some primers will flatten at safe pressures, some won't flatten at all and some primers can even blow out of the cartridge.Definitely check for additional indicators if you see this though- I view oddball primers as the clue that closer investigation is required. Winchester SR primers have 0.021" thick cup. I didn't find that a 25# mainspring made any . Hoppe's #9 works better for removing primer crud than the BH solvent IMO. It may have weak springs. The first attempt to remedy any stoppage of an AR-15 should be what those in the know call Immediate Action: "Tap, Rack, and Reassess." "Tap" your magazine to be sure it is properly seated "Rack" pull the charging handle of your AR-15 back swiftly with ample force and release it cleanly When they get a bad batch they pull the whole lot down weighing 10-15 and get the amount "Average" only is off a little. (AR spec call for .028 to .036). In other words, the shell does not fire and bullet does not come out of the barrel because the primer did not generate a big enough spark to ignite the gunpowder. CCI are among the harder primers and usually good solid performers in AR style rifles. Holding the upper ass'y level tilt the receiver end downward to about a 30 degree angle; if the bolt doesn't slid out on its own, start looking for evidence of interference. With an unloaded gun, open the breech, pull the trigger and push on the hammer. Reactions . Pull down a whole batch of Rifle at 50 grains and ya got some powder sitting there. It fits great and scrubs the hell out . It sounds like it may be the typical small mark made by the non-spring loaded firing pin. A post at Primetimer said it was part of an ongoing "debate" on the program over guns: "You got an AR-15, we'll put your ass in jail," she screeched. When you rack the 870, the gun feels solid and well-built.