303 bullet size

[lightning22]

The throat of mine slugs at .314, I shoot .316 diameter cast lead bullets through it. If I use jacketed it's going to be .311 which is the standard .303 size due to the odd way they measured it.

[tacfoley]

The throat of mine slugs at .314, I shoot .316 diameter cast lead bullets through it. If I use jacketed it's going to be .311 which is the standard .303 size due to the odd way they measured it.

First, they made a hole.

It measured .303" diameter.

Then, they put grooves in it.

THAT made ANOTHER diameter that was bigger, namely anything between .311" and .316".

Not odd, just the way they measured stuff back then.

Same with .577" and the .600" bullet.

The 45-70 Govt with the 457" diameter bullet.

......and so on.

The average .44cal BP revolver shoots a ball anything from .451" to .457" diameter.

It all harks back the days of black powder and deep-groove rifling.

tac

[gtpkeeper]

The throat of mine slugs at .314, I shoot .316 diameter cast lead bullets through it. If I use jacketed it's going to be .311 which is the standard .303 size due to the odd way they measured it.

just sluged it from the throat and its still .318

unless this gauge is buggered