... that's assuming you're comparing Normal primers to plain primers or Magnum primers to Magnum primers ... not Magnum primers to Standard primers. There's an exception with handgun masses that use large pistol primers ... WLPs produce about 15% much more flash than other models of normal large pistol primes https://winchester-large-pistol-p68901.canariblogs.com/not-known-factual-statements-about-federal-gold-match-large-rifle-primers-46972093