Originally Posted by Mikecr
A tighter bushing doesn't change tension. Sizing LENGTH does this.
By temp needed, I meant will you need the barrel hot/med/or cold in the field?
I agree. .003", .002", .001" below caliber doesn't change tension. But, .000" does.
Is he talking .001" before or after springback?
A bushing that sizes to .001" less than caliber can be a problem if....
(a) your measurements and/or neck wall thickness aren't accurate/consistent and you end up with some that are really about .000" below caliber
(b) if your neck walls begin to thin and/or need annealing after numerous firings and you end up around .000" with some