I'm wondering why anybody would put a muzzle brake
on a .204 Ruger???
I have a 4-16X scope on my .204 Ruger CZ 527 Varmint, and no problem spotting hits at high power.
I suspect the Muscle Brake assaults your ears just as well as any other muzzle brake does, so can't see using one on a caliber that doesn't need it.
It might increase accuracy, if 7/8" groups at 200 yards ever proves inadequate for me.