Extractor coming out of the bolt LRB M1A
It has been awhile since I have posted, but have kept up.
This post is asking for anyone who has seen this problem and the solution. Perhaps Gus or one of you other experts can help.. I have never seen it before.
Here is the problem: A Jarhead friend of mine brought a M1A, LRB, receiver, GI barrel, all other parts GI. Original bolt is TRW. It came with the bolt still in the rifle, but disassembled as the extractor came out. The extractor came out while shooting, Atomic Ammo purchased from CMP. Originally I thought we had a bolt problem, but I thoroughly checked the bolt and found no problem.
I replaced the bolt with a SA GI bolt and checked the head space. Everything was OK.
Next, less than 30 rounds shooting the same ammo, and this bolt(SA) lost it's extractor.. The same way. Two bolts, two extractors.
I disassembled several of the loaded rounds and found that they were very consistent. 168 grain bullet, 41.5 grains of what appeared to be IMR4064 or 4895, but hard to tell due to being extruded powder. The primers appeared to be Remington 9 1/2. The cases are all LC or WCC.(Once fired supposedly)
I measured the cases, fired and unfired and found very little difference.
Does anyone have any ideas here??????? Going to fire my hand loads in the gun and see what happens, also going to fire one of my GI level M1As with the CMP ammo to see if I can duplicate the problem. Also going to check inside the chamber and the extractor recess with a bore scope this PM.
Any ideas would be greatly appreciated.. I thought I had seen it all, but this is new.