I'm reloading .45 acp with 200 gr hardcast bullets on a 550b. My cartridges tend to bulge on one side. You can definitely see and feel that there's a raised side where the the bullet seats. Opposite that side the cartridge wall is fairly straight. I've played with the bell a little, mainly to not shave lead/lube. When I take a belled case and roll it on a piece of flat steel, the amount of light I can see under it varies a little and it varies from case to case. I can run them through the factory crimp die, but that still doesn't make them concentric. They do chamber alright. I'm perfectly comfortable with bullet bulge where the bullet seats as it's obvious even on factory loads, however factory loads are visibly concentric. Is this normal? How much does concentricity affect accuracy out of a handgun? Regardless of performance, what would you start looking at in order to make factory-looking, uniform cartriges? Thanks for any help/wisdom in advance.