... that is assuming you are comparing Regular primers to Standard primers or Magnum primers to Magnum primers ... not Magnum primers to Standard primers. There may be an exception with handgun loads that use large pistol primers ... WLPs deliver about 15% additional flash than other brands of Standard https://winchester-primers-in-sto62614.tinyblogging.com/considerations-to-know-about-federal-large-rifle-magnum-primers-215-75605476