I've been using it for a short while in my 45-70 only. So far, it seems
promising. Using the 12 grn load from the Hodgdon's site with a
400 grn plain base cast I got exactly the 970 fps mv they claimed
out of my 1895 Marlin w/ 22 bbl. I'm experimenting with some
13 and just a tad over loads now. These seem to be in the
25K-27K CUP range, burn quite clean, and have mild recoil.
I'm using Starline brass, CCI-200 primers, and Lee Factory Crimp Die.
I got just under 2" groups at 50 yards without trying, and the
cast LFN I am using may be a bit undersized.
The price seems good until you realize that the 1 lb bottle size only holds
11 oz of powder, but I like the fact that it really fills the case well.
I'd say give it a try. If use use 300 grn bullets you can get over Mach 1,
in the 45-70, but not so likely with 400 grn bullets.