Very true. I have slugged 2 of my Savage .32-40's and one is a heavy .319 and the other .320. However I have measured the dia of some of my jacketed bullets and they also vary--for instance, the Horn. 3210 ranges from a light .320 to .322. The Rem corelokt 8mm 185 gr. I have rarely drops below .322 and mostly measures .3238 to .324 (rarely makes it to .324). I have some pulled .303 Brit bullets from old Dominion (Imperial) ammo and it ranges from .309 to .313. I think I am going to experiment with making a swage using grade 8 bolts that will fit one of my loading presses and try swaging the 150g 8mm jacketed bullets down enough to fit the .32-40's.