Marketing hype.

Ironically, Winchester has basically redesigned the WSM case to be like the Remington SAUM case. The biggest difference is that you can now get .277 caliber barrels with fast twist rates to stabilize long, heavy high BC bullets.

Remington had the better case design 20 years ago when the short magnums were introduced, but the WSM won out because the were first to the market, had a little more speed and better marketing than Remington, as usual.


Dying ain't much of a living boy...Josey Wales

Molon Labe