flamatrix99
Well-Known Member
As far as bullet seating depth how close do your dimensions have to be to the book? For 9mm my Lyman manualhas a bullet length of 1.169" and a diameter of 0.380". If I am +/- 0.002 is that close enough?
plenty close enough. grab a box of factory ammo and give a few a measure and you may be very surprised.
Good advise from Danny Abear. I make one with no primer or powder to make sure the depth will function smoothly in my gun. If OAL falls in a .005 range of what I'm trying to get, I'm perfectly comfortable.
Don't ask how I learned that
As far as bullet seating depth how close do your dimensions have to be to the book? For 9mm my Lyman manualhas a bullet length of 1.169" and a diameter of 0.380". If I am +/- 0.002 is that close enough?
if you want to find the correct OAL for your pistol, take a fired casing and stick a bullet in the casing and press it into the barrel until it stops on the lands. Take it out then measure the whole round and subtract a couple .001 and that is what your OAL should be for that gun. Adjust powder accordingly to length, it will take a chrono tho if you want specific velocities