Function difficulty:  About the 3rd spherical I get a light hammer strike.  I've tried the two H2 and H3 buffer weights.  H2 I had been only acquiring a person shot, H3 I now get two pictures off.  I've attempted this on two uppers, a person carbine and a single pistol, but utilizing the exact same BCG.  I requested an aimsurplus NiB BCG, I'm