Rooster59: Haven't observed any position sensitivity with HP38/231 in .45 Colt cartridges to date, but don't doubt it could occur. Have certainly seen it happen with other calibers. Seems to occur most often with light bullets matched with very light powder charges. Throw in a too-light crimp, and erratic powder ignition does seem to occur more frequently. I prefer to stick to mid-range loads or a bit stouter.
My go-to powder for the .45 Colt most often, is either Unique, or its near-twin sister: Universal. Overall good performer in this caliber, at least in my experience. Bullet weights anywhere from 200-250 grains.
Most of us will have our own personal favourites. Your gun will often dictate what it likes. I still believe that black powder is the ideal propellant for the big Colt cartridge(But only in revolvers.....44-40 a better choice, in rifle). But, that's a discussion for another day.
Alex McKr, you sure could be right. When I was messing with 231 & HP38, I was trying for CAS loads….getting down into mouse phart territory. I just went back in my notes and was using a 200 grain bullet so, on the light side.
For standard loads I like Unique and Universal as well. I’m having good success with Power Pistol too.