I STILL CRINGE when reading of Unique and the 45-70... to a lessor extent the use of 2400, same same... The 45/70 is a HUGE case for small amounts of fast burning PISTOL powders... They are PISTOL powders ya know... The factory labels the cans so we know what they are intended for.
There are MUCH BETTER SAFER choices!!!! The SR powders, XMP5744 and don't forget Trail Boss... Just sayin' as I worry about these things ya know.
CW
I hear what you are saying, and yet there's Sharpe's book making it look like it was an everyday thing at one time. (Perhaps it wasn't a good idea then either for all we know...)
I read in a forum in here that at one time Unique advertised on the canister that it was for reduced rifle loads. But I can't prove the statement.
That's why I'm asking around. Seeing what I can turn up.
It strikes me as an attractive idea, but yet somewhat on the fringe too.
And yet again, the 45-70 is a straight wall case... not much different than a shotgun case in some respects... and shotgun powders are among the fastest of all.
On some level I'm thinking of a 500 gr. 45-70 projectile as being about the same weight as a 12 ga. slug, but with better BC and rifling to boot.
However, the shotguns have wads. And are .410 excepted, larger diameter and smoothbore.
Anyway, Sharpe's data intrigued me.
Oddly enough I have an image of a 1974 Lee Loader Data Sheet for 45-70... it lists IMR 4227 in some of the loadings for 1886 Win., at way larger charges than I'd have thought given it's in the 2400 class of powders. But what caught my eye was one IMR4895 load for trapdoor level loads.
My New Lee Loader for 45-70 is sitting up at my UPS box... is going to be interesting to see what the current powder scoop and charges are.
Anyway, for your review...
http://picturearchive.gunauction.com/253254/7891451/5ea40fe14e92a464683174c5234494b7.jpgI guess my point is... if 14 grains of Unique or 24 of 2400 does the same job... why burn 37.5 of IMR 4895? (Abarring some negative effect on the gun I don't know about.)
One of my inspirations for this mentions in his vid that he's using IMR 4227.
http://www.youtube.com/watch?v=3duhNVjAu6EHowever, compared to Richard Lee's own vid, this guy is taking some risks with his fingers... If you closely watch Richard, you see that even though he's fast... his fingers are never in the possible line of fire..(Well maybe for a fraction of a second dropping the bullet in.)
http://www.youtube.com/watch?v=UeEl9wZyabc