So about every 400-500 shots I was noticing a significant drop in velocity so I put a little witness mark at the 12 oclock position on it with a sharpie and sure enough it keeps backing off gradually. My buddy suggested to put a little teflon tape on it but I wanted to get some opinions on that first. I also thought about a dab of blue loctite? I've had mags in the past and never had this issue.

It's a 1994 classic valve lvl 7.

I am only running about 650 psi if that might make a difference but I have a high pressure piston for my reg ordered that will bump up output to the 1050 psi range.

Thanks for any advice.