If the barrel is brass you can simply cut the barrel back to the exact length that you need. Take care to ensure that the muzzle is perpendicular to the bore and that there aren't any burrs on the lip of the bore. Crowning is a popular method to remove burrs and clean up the muzzle. If you don't know what crowning is google it.
If the barrel is aluminum you can do the same as brass, but it's not advised to do that to barrels that have an bore lining treatment.
If the barrel is stainless steel, you can do it as well, but it's a much harder material to cut accurately (without power tools) and tidying things up afterwards is tough too.
I'd advise against cutting a barrel with a pipe cutter. They'll typically bulge the end of the barrel and leave a less than desirable end. A straight cut with a hacksaw (fine tooth metal blade) and some careful work with a mill file is all that's usually required. It comes down to how careful you are.
Best of luck,
Tys
|