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Posted: 2/18/2017 3:38:13 PM EDT
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I have had about 4 or 5 AR's with Wylde chambers - all from RRA (upper assemblies and BCG's). RRA assembled, not me.
I haven't had NUMEROUS splits (reloaded 6 times - 22.5 gr H322, 55 gr bullets, 2750 fps) until my latest: 16" carbine mid length with H1 buffer. Firing in cases (LC 12 thru LC 14, loaded for 4th time). Had started noticing splits so I check 18 rounds after loading, no neck splits. Fired 18 rounds - ALL HAD NECK SPLITS! Rifle has had approximately 500 rounds fired (reloads as noted). There are scratches on neck (cause during extraction/ejection). Neck thickness measures .012" - using thin blade SS calipers. Will have chamber examined and lapped. Other suggestions?? Remove sharp edges from feed ramps? Check head space? Thank you for your help!! 
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Quoted:
I have had about 4 or 5 AR's with Wylde chambers - all from RRA (upper assemblies and BCG's). RRA assembled, not me. I haven't had NUMEROUS splits (reloaded 6 times - 22.5 gr H322, 55 gr bullets, 2750 fps) until my latest: 16" carbine mid length with H1 buffer. Firing in cases (LC 12 thru LC 14, loaded for 4th time). Had started noticing splits so I check 18 rounds after loading, no neck splits. Fired 18 rounds - ALL HAD NECK SPLITS! Rifle has had approximately 500 rounds fired (reloads as noted). There are scratches on neck (cause during extraction/ejection). Neck thickness measures .012" - using thin blade SS calipers. Will have chamber examined and lapped. Other suggestions?? Remove sharp edges from feed ramps? Check head space? Thank you for your help!! Every time you resize the case you work-harden the neck a bit. After so many cycles, it no longer has the elasticity require to stretch, and use breaks. How many cycles, depends on the brass, sometime you can get 4 or 5, sometimes less, if older brass. |
| Yes, I had the same problem in my Daniel Defense. No splitting of neck on the brass, but some pretty deep scratches in the neck of the brass. I like to reload and will not use the brass again that has the scratches. Friends say just shoot steel, I have a problem slapping steel against steel. That is a very opinionated subject also. I just will not shoot steel, and again very opinionated. I have just about eliminated the scratching, the scratching is done on the extraction process. The way I fix this is just very lightly knock off the sharp edges on the back side of the lugs in the barrel. When you look through the ejection port you can see how the ejector pin pushes the brass into the lugs of the barrel. Drop in a empty case by hand then release the bolt. Then just slowly pull the bolt bolt open and look through the mag port to see which barrel lugs that the brass neck rubs on when it is being ejected. When the brass is being ejected after it clears the chamber the ejection pin pressure push the brass at an angle and pushing it to the lugs, and that is where the scratching occurs. I had to polish the back of the lugs in the barrel to get mine fixed, and believe me the lugs are extremely hard to get at. So this is how I fixed mine. I do not recommend using any kind of Dremel tool to remove any metal. How ever I did use some of their wire brushes to help polishing the back side of the lugs. I was able to do this by removing the barrel (much easier to get at). Now the anodizing is removed in these areas. The Anodizing process increases corrosion resistance. But in my opinion if you clean your rifle like you should and keep it cleaned and oiled you should have no problem. Well thanks everyone this is how i fixed mine. And of course if your rifle is new or the manufacture will replace the barrel for free by all means do that. |
| Smoky, you mention maybe to remove sharp edges from feed ramps? In my rifle the brass is being scratched on the extraction and ejection process. And in my mind the brass should not touch any part of the barrel during the extraction and ejection process. But that is not possible due to the design of the AR15. Kind of poor design in my opinion. The whole system is not in my opinion very reliable. Now I bet I have opened the door on that one? LOL. Just to many jams for one reason or another. My grandson was in the army and they told him clear the jam, take the magazine tap it on his helmet (i guess to line up the bullets in the mag) and re-instal the mag. I can only imagine doing this while be shot at? Oh well even the Military (Colt) had problems with the design. And of course we only have civilian rifles and not the Military units. And of course the military does not re-load so no one cared or not if the brass was scratched. Almost all of the military brass i have bought do not have scratches on the necks. But when closely examining the brass you can see all kinds of little dents and scrapes, and who knows what causes them. One of the problems that I had with this Daniel defense was the feed ramps did not line up with the receiver. I fix that with some thin shims to space the barrel back a few thousands. The ramps line up perfectly now. I see where some people are grinding down the feed ramps to match the receiver. Nope I don't recommend that. Stainless steel shims between the receiver and barrel correct the problem, and of course it does not effect headspace either. Just food for thought. |
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