I have 181 series that I had ASI cut down the barrel and install a muzzle brake. It is now the minimum legal length. I also got some new gas bushings which I started with the smallest size that was .040. The action would not cycle so I installed the largest (.050). It helped but failed to feed a round. Next I drilled out the bushing to .065. It now ejects brass a couple feet but still FTF 50% of the time. The bushing is now larger than the gas port in the barrel. Is the loss of gas pressure normal due the reduced barrel length? Should I just keep increasing the diameter of the gas bushing orfice or am looking at a diferent problem? Appreciate any advise.