Check out Rocky Mountain Reloading. They make in house a 124g and a 147g jacketed flat point in .38 cal for 11 cents each, DELIVERED. I've shot thousands of both in my pair of Ruger stainless black hawks and my Henry .357 lever rifle. H110, W296, N110 all work great for stout loads. Was using N105 but my supply of that is gone and it's no longer made. Accurate #9 works well and I've used Autocomp and CFE Pistol for less than max (plinking) loads. I've always used a mag primer in .357Thx, I guess I will have to transfer my understanding of modern hi-power target rifle physics and ballistics to a handgun/carbine round. I didn't even know my AE calculator would accept a G1 bc of .142! lol. One step up from a ball bearing!
A few things:
2400 is not a viable powder because it is not available so maybe H110, W296, imr 4227 or N110 seem to be the options.
I am gonna be shooting alot off the hood of my truck in AZ desert and not sandbagged on a bench!I Plan on doing alot of shooting so expensive hunting bullets are out of bounds, as are cast. I found a Florida outfit that sells 125gr jacketed lead flat nose for 12c each. More like it.