I have and like the 257 and the 270. I’m not much of a magnum rifle guy but neither of them produce a lot of recoil.
I have used them enough to believe that something happens on game when you get over 3500fps as long as you’re careful to use good bullets or stay in the ribs using softer slugs. In numerous deer, elk, and caribou I’ve used these two on from 75 to 400 yards I’ve never had one move more than a few steps.
I’m not a MKV guy, one of mine is a M70 and the other is a Voere. I received both with badly pitted barrels and got a good deal on the blanks I ended up using, never actually set out to have a WBY mag just a matter of convenience. I haven’t used any Weatherby brass either. I have friends and family who aren’t handloaders but are 7RM shooters. They give me their once fireds and I run them through a FL die and Viola!
