make sure you don't put the cart before the horse. Find out if anyone is willing to re drill the barrel.

Most of the time you need a decent step up in caliber to re drill a barrel as a gun drills oil hole needs to contact steel so as the chips can be flushed out. You will have do get some measurements of 404 drill and see if the 375 hole is small enough to cover the oil hole. the only way around this is to plug the 375 barrel with a press fit rod = more money.

Another thing is barrelmakers are set up to drill rifle blanks generally of 1.25" and they are profiled to size after. To set up a barrel that is already profiled could be a time consuming job as well as a break down of their process - more expensive then just buying a new barrel.

I would just by a 404 barrel.

Tom.