Probably the 7 mm or the 300 neither of which I've used. Did use the 340 for two decades or so and took about ten bulls with it. I didn't intend it to be a long range affair as most think of it now but to be a hammer on cross canyon, or open country elk say to five hundred yards. It was. I came to love the cartridge and the platform I had it in.
Also used the 270 in a ginned up 700 with the "Weatherby throat" and never could get the accuracy I wanted. It was table-top flat to five hundred though and is the only cartridge I shot OVER a deer with at about 350 once.
