wsmallwood
Member
Reverse taper barrels, as I understand it, attempt to take advantage of the expansion effect of the bore when a barrel is turned down. So, you end up barrel bigger on the muzzle end than on the chamber end and a bore just the opposite. It seems, at least in theory, that such a barrel would not need as much lapping to get the desired tapered bore.
In general if you look at a reverse tapered barrel you really don't notice it, so I have a question or three. To make it easy we have a barrel that is 1" at the chamber (yeah I know, too big, but we're making it easy) so what should it be at the muzzle end for the optimum reverse taper assuming a 28" blank? Or just think of it as increase in diameter per inch or something. Now considering that some barrels seem to be washed out on the chamber end due to lapping, would a 30" blank be better (so it could be cut off like he muzzle end and still get a fairly long barrel)? Finally, does anybody know if reverse taper really affects the bore much and, more importantly, if it does affect the bore, is it consistent?
I know they're shorter but it almost seems to me that an good barrel for a non-sporter BR rifle may be a sporter blank which seems to be already reverse tapered.
Any comments?
In general if you look at a reverse tapered barrel you really don't notice it, so I have a question or three. To make it easy we have a barrel that is 1" at the chamber (yeah I know, too big, but we're making it easy) so what should it be at the muzzle end for the optimum reverse taper assuming a 28" blank? Or just think of it as increase in diameter per inch or something. Now considering that some barrels seem to be washed out on the chamber end due to lapping, would a 30" blank be better (so it could be cut off like he muzzle end and still get a fairly long barrel)? Finally, does anybody know if reverse taper really affects the bore much and, more importantly, if it does affect the bore, is it consistent?
I know they're shorter but it almost seems to me that an good barrel for a non-sporter BR rifle may be a sporter blank which seems to be already reverse tapered.
Any comments?