memilanuk
Gold $$ Contributor
So... lets say you want to match the throat on barrel A, on barrel B... and you have a Unithroater 
The directions go over how to set the throater to match an existing barrel's throat. Got that part.
My (admittedly limited) experience is that the throat tends to 'move' a little post-chambering; I've seen up to 5 thou, personally. Not sure if that is a little, a lot, or average?
Where I have some question/concerns is this: if the *existing* barrel has already moved, and then we set the unithroater to match *that*, then the new barrel is likely to end up even *longer*, once it moves as well. Yes/no/maybe?
So if the answer to the above is 'yes' or even 'maybe'... would it be advisable to take the setting from the original barrel, and shorten it up a fuzz (technical term) so that when it *does* move, the new throat ends up right where the original one is?
Thanks,
Monte

The directions go over how to set the throater to match an existing barrel's throat. Got that part.
My (admittedly limited) experience is that the throat tends to 'move' a little post-chambering; I've seen up to 5 thou, personally. Not sure if that is a little, a lot, or average?
Where I have some question/concerns is this: if the *existing* barrel has already moved, and then we set the unithroater to match *that*, then the new barrel is likely to end up even *longer*, once it moves as well. Yes/no/maybe?
So if the answer to the above is 'yes' or even 'maybe'... would it be advisable to take the setting from the original barrel, and shorten it up a fuzz (technical term) so that when it *does* move, the new throat ends up right where the original one is?
Thanks,
Monte