Bottom line, who am I to call you crazy?
There's a fair number of SP shooters that are using 7mm WSM
's, 7mm Dakota's, 7 LRM's and many of the large .30-.338 cal. chamberings in their pistols. Most are using the slower powders that perform best in the rifle length barrels. And yes, the long high BC bullets like the shorter barrels. I believe the short stiff barrels have less harmonic issues.
One of the inevitable bi-products of these combinations is muzzle blast and muzzle flash.-Unless you have a can on the gun, it's just the way it is.
My largest SP is a 6.5 X.284 with a side discharge brake, and it a bit obnoxious to anybody that is shooting or spotting beside you. The faster burning powders offer poor load density in the large case, and accuracy will typically suffer. Hope this was a little bit of help to you in making your decision...