Originally Posted by Brandon Harriso
Anyone care to suggest a starting load for either of these bullets.
I have 2400, H110, H4227, and Unique. I want to try Unique with the 300 grain bullet, and was thinking 7.5 grains to start.
Will look for published data as the bullets i worked with were not quite the same as anything out there and my results won't match.
OF the powders listed, PLEASE start your work with H4227. It may not be the best powder, but it will be the hardest to get into trouble with...considering the volume of the case left after seating tose heavy bullets, it will be hard to get a serious over load into a case. Once you get a handle on H4227, then can work with the others.
Unique is a bit faster than the others listed, and heavy bullets with faster powders tend to run pressure up quickly.
Long time ago, when the .41mag. was a baby, they didn't quite know how it was going to be used. Lyman made some 210gr. HBWC molds. By making new hollow base plugs (some not hollow based) and seating backwards, made various weights from 210gr. to 340gr. with RN, SWC, or FN shapes.
Now these probably set a bit deeper than anything offered commercially in that weight, so my case volume was a bit liss...but IMR4227 was the accuracy choice. normally 4227 doesn't burn real well in revolver rounds, leaving a good bit of unburned powder littering the barrel...but with a heavy bullet, that powders seems to burn quite well. Won't be as fast as can be had with some of the other powders, but it's a good place to start looking for accuracy with near 100% loadfing density an safe pressures.