mickb wrote:Your a more intrepid experimenter than me Blade,. Not knocking you either, I know you make it work. Just a caveat to anyone reading remember ultra low power loading is expert level, check barrel to make sure bullet exited, check chrony for weird variances. If it doesnt exit, you hammer it out. Cowboy action shooters developing loads have to do this not uncommonly. Thats with slippery cast bullets and approved pistol powders too. Anyone trying with rifle powders is in unknown territory. Jacketed bullets make bullets sticking much more likely too.
I'm happy to experiment, and I'd rather do it and post the results, than have somebody less experienced get hurt trying new ideas.
I've had quite a few jacketed bullets too lazy to leave home, they push out easily enough with a rod
It takes about 250fps for a jacketed bullet to overcome bore friction and push out the muzzle, I've never measured one lower than 275fps, and at that speed they're pretty much falling on the ground (that was in .243). I've found them while walking up to the target.
The issue with rifle powders in tiny cases behind heavy bullets is getting enough pressure to get decent velocity, the longer barrel helps with that. A duplex load of a grain or two of something faster on the primer is a big help in getting a charge of slower powder to burn. 9mm is a bust if you only have rifle powders - in my opinion. You can make it shoot but not in a very useful way, and it won't cycle a semi-auto pistol. But if you only have rifle powders and you need to kill something, you can make it do the job. And it'll be zero-recoil
I haven't tried AR2206H in 12ga yet, which is something I'd like to do. I expect the issue to be even bigger due to the volume of the pipe and the greatly-reduced bore friction of the shotcup, but there's only one way I'll know for sure.
In the old days there was one powder that did everything, blackpowder. There's no reason a modern smokeless can't do everything as well, but it won't do everything very well, and some of it very poorly. I don't see it as any different to the guys that spend hours grinding "strike anywhere" match heads to make ammo work