Here's something I have wondered for awhile.
I know to use RNFP or TC in lever guns to prevent magazine tube detonation from either recoil or pushing rounds in.
One time... I got a box of 45-70 ammo that said safe for lever guns, and it had a RNFP.
When I opened it, the flat part (meplat?) of the bullet was about 1% smaller in diameter than the diameter of the primer.
Wouldn't the flat part need to be slightly larger than the primer so it catches on the brass to prevent detonation?
I was considering maybe it's because a primer will only ignite if its impacted with a "needle shape" (firing pin) and even if the bullet were to very heavily impact the primer, it wouldn't go off because its the entire surface area of the primer being struck instead of only a tiny part of it.
I wanted to be 100% sure though.