Im shooting 6.5 saum prime ammo. When I try to slip a 147 eld into the fired & unsized case, the bullet stops at the neck shoulder junction. So I know I have donuts. I'm not accustomed to having donuts or maybe I just never knew I had donuts with other cartridges. My question is: will donuts always keep a rifle/ load from shooting good when you will be seating the boat tail junction below the neck/shoulder junction?