Honestly there's a good chance that m193 is already factory loaded with the keg version of H335. I would pull a bullet to spec one out as far as seating depth vs bullet length and measure out the powder charge. If you wanted to create a match quality ammo you could also sacrifice a round to even out the charges with the powder from the pulled round.
I've enjoyed a good 10 lbs of aa2230 over the years but strictly for 60gr and under. Now I try to use Tac for everything and have found most of my rifles shoot the 60-65 gr bullets the best. They are mostly 1:8 twists though.
As far as primers just keep checking around, midway, powder valley,Brownells,graf's,etc and you will see things pop up. Also you can usually work a horse trade of some kind to get what you need for what you've got.
Lastly, don't hesitate if you can get a great deal on a gp100. You should be able to find 38 special to shoot out of it if nothing else.
I've enjoyed a good 10 lbs of aa2230 over the years but strictly for 60gr and under. Now I try to use Tac for everything and have found most of my rifles shoot the 60-65 gr bullets the best. They are mostly 1:8 twists though.
As far as primers just keep checking around, midway, powder valley,Brownells,graf's,etc and you will see things pop up. Also you can usually work a horse trade of some kind to get what you need for what you've got.
Lastly, don't hesitate if you can get a great deal on a gp100. You should be able to find 38 special to shoot out of it if nothing else.