In Nosler's reloading guide they list 5 loads that shoot 160 grain bullets at 3,100 mv from a 24" barrel from a 7mm WBY.
Two of those loads nearly reaching 3,200.
I wanted a 7mm Mag and thought hard about the Mashburn because of the negative press about pressure problems with the Remington Mag, but ended up with a good deal on a 7mm Weatherby instead. It gets very close to some of the numbers quoted by Bob for the Mashburn. Federal factory loads with 160 Trophy Bonded Tipped are cruising at a little over 3200 and shoot into 3/4". That load may be hard to top with handloading or even wildcatting.
