Quote:
Originally Posted by shocker
"Tenths" is machinists slang for ten thousandth. To be precise, 4298, so for the vast majority of us who only have 0.001" micrometers, 430.
Even 429 would probably work fine. I mean the bullet would swage to the bore anyway because the lands are a constriction.
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That is just it, the bullet wont likely bump up to seal the bore if it is swaged down by the cyl throat. You get gas blow by, leading & generally poor accuracy. I have a RBHss in 45colt. It had tight 0.4505" throats. It shot ok but always leaded, regardless of the bullet alloy or lube. I honed them all to0.4515" & run 0.452" bullets. Leading went away & accuracy improved about 100%. I admit to NOT slugging my barrels, just shoot slightly over size bullets. I have too many guns in the same caliber to be making ammo for one specific gun.