What would be the best weight spring to use with a G17? I shoot only 147gr and it does seem to have more recoil than 115gr, so I'm thinking that the stock 17lb. spring is weaker than necessary if I'm shooting only 147 gr. bullets. I'm thinking about the Glockmeister captured tungsten guide rod with a 20 lb. spring. Is that reasonable? Could I go to a 22 lb spring without getting into FTF/FTE problems? My overall goal is to reduce recoil and muzzle flip without compromising reliability.