I just started reloading for a new to me caliber,quick load does list a 416/348 win,mine is an improved version,I calculated three different loads on quickload,I adjusted the length & case capacity,because of mine being an improved version.
I shot the gun over a chrono today,all three loads were about 200 fps slower than predicted on quickload,the gun in question is a win 71 lever action,what should I take away from this experience,the speeds were slower because of lower pressure than what was predicted by quickload or what? I am at 2050 fps avg with all three loads,I would like to hit 2150 if I can safely do so,thanks for your help.