That one slipped my mind. Is that just a rebarrel?
7mm Rem Mag to 375 Ruger is just a re-barrel.
Alternatively, if you trim the 7mm RM bbl back to say 20" you should have enough meat left at the muzzle to accommodate a rebore. Some might suggest taking a turn off the tenon when going 7mm RM to 375 Ruger. The benefit(s) of a re-bore are 1) a cut rifled barrel, and 2) maintaining the original barrel profile. Word to the wise though. If you rebarrel/re-bore to 375 Ruger, make d*mned sure the stock is bedded, the area around the tang is relieved, and consider cross-bolts behind the recoil lug and between the mag well and trigger opening.
