I started out with 56 grains of 4320 under a 250 grain bullet in my 35 Whelen and it shot so well I didn't see a need to change. I have tried RL15 and it worked fine, similar accuracy and velocity, but didn't notice any advantage over the 4320. That's not a slight on RL15, I just have a lot of 4320 so don't see a need to change.

Last edited by mart; 03/28/17.

Chronographs, bore scopes and pattern boards have broke a lot of hearts.