It was appreciated for reduced loads in the 45-70.
The original 45 70 load (refered to as 45/70/405) was 70 grains of black powder under a 405 grain bullet. This produced a velocity of 1350 fps.
There was also a reduced load 45/55/405 that gave 1150 fps.
My interest with SR-4759 is to produce similar velocities.
My Lyman 50 handbook shows these loads:
330g lead 26.5 to 28 grains 1454 to 1533 fps 385g lead 24.0 to 26.5 grains 1252 to 1426 fps 405g lead 24.0 to 26.5 grains 1258 to 1415 fpsI am tempted to try 24 grains under a 350g Berry's plated bullet and see what I get. This would be an "intermediate" load, with more velocity than I would get using Trail Boss or 700X.
I have some pages from a very old Lyman Cast Bullet handbook that show less potent loads for these bullets using 4759, but they require a polyester felt patch to hold the powder near the primer and I would prefer not to deal with that.
When I run out of 4759, then what? My Lyman 50 shows some loads with Varget. Believe it or not, 42 grains of Varget under a 405g lead bullet gives 1258 fps -- the same as the SR4759 load!! I will have to try these and see what I get.
Tom's Computer Info / tom@mmto.org