Purpose concern:  On the 3rd spherical I get a light hammer strike.  I've tried the two H2 and H3 buffer weights.  H2 I had been only receiving a single shot, H3 I now get two photographs off.  I have tried using this on two uppers, just one carbine and a single pistol, but using the exact BCG.  I ordered an aimsurplus NiB BCG, I am planning t