I just had a bright idea. I'm swapping barrels, 22-250 to .223. I want to keep the headspace and jam length the same on my .22-250 barrel so when I reinstall it the loads that I have worked up still shoot the same. So I figured why don't I seat a bullet to the jam length for each different bullet and then all I'd have to do is chamber the round with the bolt closed and screw the barrel down onto it until it stops, which would be when the bullet touches the rifling. I've never swapped a barrel before, Mine is still in the mail, so I'm not sure if this will work but its an idea. Now here's the question. For all you people with experience in changing barrels, would this work and if no why not?