I cast and play with sub sonic loads from the .22 K Hornet to the 35 Remington. This winter its a 22K, a really pretty .222 Sako Vixen and a .308 Rem.
So to narrow it down I'll ask it like this:
What's your "go to" powders for sub sonic loads in small calibers and what is your "go to" powders for subsonic larger calibers?
As a side note I have a comment regarding primers and sub sonic loads. I've shot enough in a controlled environment that I can state (at least for me) that powder to powder there's no guaranteed result that small pistol versus small rifle primers will act as we would expect.
I know this goes against everything I've read on line but here's an example. Bullseye and the 225538 44 grain Lyman consistently has a lower velocity with small rifle than small pistol primers. Possibly supporting the theory that the small rifle primer is causing insufficient burn and the bullet is leaving the case before the power is spent. On the other hand I can shoot both small rifle and small pistol with Unique (again sub sonic) and you could flip a coin as to which would be a few fps faster or slower using the same charge. And at least for me, when using Unique neither SR or SP had an advantage over one another regarding accuracy.
I know Bullseye is faster than Unique but I can't begin to understand what the heck is happening there. Thanks for listening. Bill.