Been thinking over the last week about barrels and how if you buy a barrel from border or the likes, they can design it or recommend one which will shoot a very specific bullet very well.
Heres my question;
With a factory barrel, is there any way of shortening the chamber in order to make it so that the OAL of your home load can be shorter but still getting close to the rifling? Im obviously thinking you will lose a bit of length of the barrel but cant be much.
Also, regarding barrel shortening, is there a rule of thumb of how much velocity you lose by shortening a .308 barrel from 26'' to something like 22''?