Magnumite
Ultimate Member
I remember a concern with the larger flash holes being a concern on the lead free 45 ammo cases. Concern was the larger flash hole would raise pressures considerably. I tried it. I kept those case separate l. Once I accumulated enough I decided to try a few then run a batch if things were safe. No rise in pressures. Subsequent readings indicated the same thing. Relative to other calibers, I can’t say since I haven’t used nor noticed different size flash holes.