I may have a line on a 300 H&H that has been refinished, sights removed,stock refinished, etc. If it did not shoot well I'd look to rebarrel it, probably either to another 300 H&H or some 7 Mag. I have no practical use for a 375 but it would be a heck of a great base for one and it would be a nice moose rifle in grizzly country!
