I was shooting my 1991A1 commander the other day and about every other round would extract right in my face. I do have a shock Buff on my gun because a gunsmith thought that my spring might be a little light. Is there an easy way to check this? I am guessing,since it has only done this with the shock buff, that it might have to do with the shock buff, but before I remove it I want to make sure I have a hard enough spring. Any help is appreciated...