Function issue:  Over the third spherical I get a lightweight hammer strike.  I have tried out both of those H2 and H3 buffer weights.  H2 I had been only acquiring 1 shot, H3 I now get two pictures off.  I've attempted this on two uppers, just one carbine and just one pistol, but using the same BCG.  I purchased an aimsurplus NiB BCG, I'm goi