I have a couple of 45-70's, rifle and revolver. I have a bunch of empty brass, #210 rifle primers and some Speer 300 gr .458 JHP as well as several pounds of 2400 powder that I'd like to use up. I just bought a new set of RCBS dies.
Several of my reloading manuals list a charge of 30 gr of 2400 with a 300 gr jacketed bullet at around 1670 fps in a rifle.
My biggest concern is all the empty space in that big case with only 30 gr of powder. They also caution not to use reduced loads of 2400 because of the danger of detonation. They list the pressure at around 23,000 PSI which is well below the 28,000 considered maximum. Both my guns are modern and rated for level 2 loads.
Has anyone used a similar load and have any tips? Not looking at other powders at the moment, just want to use up some of my 2400. I'm well aware of all the other powders used for 45-70.