Something Murphy posted in a previous thread got me thinking about going with a faster powder for heavier weight cast bullets in the short barreled Alaskan:
After poking around the internet tubes for awhile, I find a little info for faster than the H110 norm like, Alliant 2400, Ramshot Enforcer, A.A. 4100 (& no.9), and then down into the slightly slower powders Murphy mentioned down to the 4227's.I don't know what velocity we could get from that 2 1/2" barrel but certainly there will be a limit and that powder may limit much sooner than another. Short barrels and H110/W296 don't mix well. My expectation is that we could get 1100 from that barrel or close and that would be a fair compromise for the combination you have there. I do know that bullet weight is the answer. That barrel/powder combination will limit velocity to some number but will well achieve the limit velocity with several bullet weights from 250 to 400 grains, therefore we will be better served with the heaviest bullet and I think the 370 grain is a practical limit in that regard. I would only change to a powder that will respond better to the short burn time afforded by the 2 1/2" barrel, namely Vihta 110 or maybe N105 or Norma R123. I just haven't tried the caliber in such a short barrel but have used the 41 and 44 mags that short as well as the 45 Colt and all have done better with powders other than the H110/W296. I think Lil'Gun may help slightly, also.
I don't pretend to be an expert on internal ballistics etc... nor do I have a truckload of experience loading for handguns. But some of you do...
Obviously there is a whole spectrum of powder burn rates that will work in this case with various bullets including some outside of the burn-rate neighborhood of H110 (Trail Boss comes to mind), but what I want to know is which side of the burn rate equation is more suitable for Heavier weight hardcast and which side is more suitable for lightweight hardcast and suitable jacketed bullets? Which end is more suitable for shorter barrels? why?
Does anybody have experience with any of these faster powders with 340+ hardcast? Opinions?