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45/70 loads and why

I cast and reloaded the 45/70 for black powder rifle silhouette, many years ago. I used a 525 Lyman and went to Seaco 540 later. I got good accuracy from both out of the REM rolling block and 32 inch barrel. I never used smokeless powder because it wasn't much more difficult for black. I indexed the shell in the chamber, and neck sized only, over a charge of enough powder to slightly compress the load with a base wad of tablet backer. I believe the load with the 525 bullet was 65 grns through a drop tube, and 62 grns under the 540. Don't know if it will help you, but there's the condensed version.
 
For reason I don't think you would. What 45/70 do you have?
Henry goldenboy, Rossi, Marlin, Henry, Marlin. i think that's all of them

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@Ethan Sackett - Thanks for starting this thread. I have a couple of 45-70 Sharps clones made by Pedersoli and a supply of brass. I need to get busy, load up some rounds and shoot them. I don't think that I'm ready to venture into black powder loading yet, although I've considered the possibility for years. Maybe someday. As I understand it, my smokeless powder loads should be limited to about the same as for Springfield trapdoor loads in these Sharps clones. Is that correct? I am looking to use these as range toys, not hunting or anything.
 
iirc bp rifles are @ 18-21k psi which includes trapdoor and all non-modern rifles? modern maxes out @ 28k (smokeless) and ruger #1 is near 40k. barnes and hornady have loaded 1895's to 42k. i have yet to reload the 2 1895's (26" cb & 18.5" sbl) i own. the r95's and s/w 1854's have my names on them, but haven't bought any yet.
 
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