Y ondering, that thought crossed my mind about 4am... So i guess its a good one since you mention it, I"ll dig up data on 300/221/whisper and see what gives.
Yes on working down. I coat the bullets with UBC, and the barrel will be coated this summer, when I get time, so that will help vs sticking some.
Fastest is quietest then?
Yep, the idea is to end up with the lowest possible muzzle pressure, for minimum noise. In theory, and it seems to hold true for the most part, small charges of faster powder peak quickly and pressure drops off again for very little "pop" at the muzzle.
I've also used Unique in the 300, and it can work, although faster powders are a little quieter.
Never tried the UBC coating, although most of my subsonic shooting is with powder coated cast bullets, which are very slick anyway.
