Never saw a magnum research rifle. Read about them.
I once had a large number of Weatherbys. Mostly German.
I had 4 in 340 Wby. I liked to shoot it over the Wby 300 as the 340 had more if a push like a 375 H&H vs the high speed recoil of the 300.

When u sold the Ways u kept 1, an early G erman in 300. Gift from FIL. I've taken Elk, deer and coyotes with it. Wish I'd kept one 340.