Those speeds are easy on brass, it will go harder but the brass suffers...
Norma brass no problem to get but it is soft...
Just finished sorting a 6.5-284 & it uses 7.5 grains less of the same powder, brass, 140 amax to go 150 slower with 2" more barrel than the Saum
My 6.5 Wsm with 4" more barrel is going 125 faster than the Saum but it is hard on brass.
So there probably isn't that much between the Saum & Wsm if built on the same platform.
I don't think you would have much trouble stretching it out a little further on animals.
Steel is a different matter, but the hi-horsepower 6.5s have a low round count & don't like heat so steel shooting isn't that sensisble.
Having said that any over bore hi-horse power round falls into the same category whether it is a .22 or .375.
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