I've read a lot of old posts and asked a few people that I shoot with locally, but I'll put this out here anyway. I'd like to run a lighter (wolff 12lb) recoil spring in my Glock 22 for production. I have a stainless guide rod with which to do it with, but is it USPSA Production legal? The load I'v been using is about 138 pf and if I go any lower with the factory 17lb spring, the gun will not cycle. Before I get the gun dialed in with a lighter load that won't work with the factory part, I'd like a definate answer on the legality of this. Thanks.