The good stuff, IE the expensive ammo shouldn't have crimped primer pockets, Winchester White Box usually does have crimped primer pockets, as well as all military brass.
I fooled around with an RCBS primer pocket swager for years, cussed that thing up one side and down the other, it just doesn't work very well. After reading glowing reports about the Dillon Super Swage I broke down and bought one, I've been kicking myself ever since!
I wish I had bought the Dillon years ago, why did I wait so long? It's not perfect, but it's head and shoulders above the RCBS, and it's fast, unlike the horribly slow RCBS! The Dillon isn't cheap, but it's worth the money.