John Linbaugh told me years ago that in testing load data in pressure barrels for the 475L that rifle primers could increase pressure as much as 10,000 PSI without a corresponding increase in velocity
jwp475, based on your experience, do you have an opinion as to whether the substitution of a small rifle primer (non-magnum) for a small pistol primer in a standard pressure 9mm would make a significant difference in pressure? I would appreciate any insight that you could provide.
Thanks!