I have a favorite load that is 5.6 gr of HP38 behind a 200 grn lead flat nose bullet from Missouri Bullet. My XD tactical loves it but it won't reliably cycle my Gen 4 21...just not enough oomph to cycle it with stock recoil spring. Does anyone have a spring setup for reduced power loads in the Gen 4 21? I can get a Gen 3 spring adapter ring for the gun, but then what pound spring to install? I'm using a Wolf barrel. The load is really nice and easy to shoot and I'd like to be able to feed it to both guns! Thanks. Wanna kill these ads? We can help!