CHS-
It would probably be cheaper in the long run to find a LH long action Model 70. The LH 7mmSTW/375 H&H are around but they are spendy when you find them.
My old LH M70 7STW chronoed at 3535 fps w/140 Accubonds & a stiff charge of 7828 and sub-moa. Of course, I sold the rifle. One of my all-time f--- ups and I've had a few, too many to
count actually.
Unless you're total speed freak, kkalaska's advice of exploring the standard 7mag/ R-26 has merit and may get you where you want to be, or at least close to it.
Good luck in your project.
sbsmith

Last edited by sbsmith; 11/04/17.