Hey everyone, I finally got out to test my new 6.5CM build yesterday and had all kinds of issues. First off, it's practically an AERO Precision rifle, the Lower, Upper, and BCG are all AERO parts and the barrel is a 22" Ballistic Advantage barrel ... so all parts as if you just bought a complete rifle from AERO.
Here are the problems I experienced yesterday, using factory Hornady American Gunner 140gr BTHP ammo, and a 10 round magpul mag:
1. Failure to strip a round from the mag - had several instances where the BCG slammed home but did not pick up the next round.
2. Failure to feed - this was the most common issue, when the BCG did grab the next round it would jam about halfway into the chamber and dent the crap out of the case shoulder.
3. I think the OAL of the Hornady ammo was too long as it looked like the bullets were getting jammed into the lands. It also seemed like the chamber was way too tight, which may have been part of the problem with the failure to feed issue. If I tried hand loading a single round it would not fall into the chamber, but get stuck about halfway in and I would have to press it down further with some force, and only slamming the bolt home would get it fully into battery. Then if I tried to pull the bolt back it would be stuck (I'm guessing because the bullet was stuck in the lands) and I'd have to slam the butt stock on the bench while pulling on the charging handle to get the cartridge out. Once out, you could see the land marks on the bullet.
When single loading by hand verything fired and ejected fine, but looking back it probably wasn't the smartest decision if I had the bullet smashed into the lands. I ended up single loading / firing about 30 rounds, 1 had a light primer strike but a second hit lit it off.
Any thoughts on where I should start to try and troubleshoot this thing? My gut says the chamber is not cut correctly considering I have bullets / cartridges getting stuck up in there.