Ya, there's a few guys here that do.
I'm having a 300WSM built right now on a Long Action Model-70.
Having it throated to seat 180 Accubonds at 3.000 C.O.A.L. which leaves me room to load 200gr Accubonds real long too without compressed loads.
Doesn't the short action magazine measure much longer in a Winchester than the Remington? I don't have mine here right now (as it's being pillar bedded), to measure but I thought it was 3.0" or very close to it.