Working on a batch of 45ACP shot cartridges made from some 308 blanks and also some 45 Win Mag brass.
The 45 Win Mag brass wall thickness is.010” and the 308s are .020”.
I made some hole punches to cut over shot wads and a .400” works well with the 45 Win Mag brass but it’s tight with the 308s
I am going to make a new punch that is.385” to see how much better it fits.