not really, get 2 or 3 types that you've heard work well in your gun and cal. Talk to someone with same cal. not me no 7mm here - then load 5 up all exactly the same except diff primer in the next 5 loads, test shoot with chrony, work firing sequence 1 of primer A, next shot primer B, and Primer C, so on. Then go round again. Reord shot placements and velocities as always.. look for consistencies/inconsistencies, try to keep everything the same during firing. No other way, should take you a session at the range (15 or 20 shots) carefully delivered. my beer is getting warm, good luck.