Wow! thats alot of cycling probs w/alot of different loads. What size are your gas ports? The port on my 7in gun is 1.5in closer than pistol and is .125. It runs 220 prohunters over 9gr of VVN110, 180 speers over 8.5gr of VVN110 or 1680, and 240 Outlaws over 10gr of VVN110 just fine.