Judge,
As you will soon find out, shooting leverguns at longer distances sure is fuunnn!
Back in the 1890's, Winchester claimed that their .44 W.C.F. (.44-40) was effective at 300 yards for deer, bear, etc.
I shoot my '73 .44-40 out to 300 meters (327 yards) at the steel javelina target (9" high x 22" long). If I do my part, and there is little wind, most of those .44-40 bullets find their mark. WHat fun!
I have found that the bullet that gives the best accuracy at that distance is the Lyman 427098 bullet. It is a copy of the original .44-40 bullet and is intended to be loaded over a capacity load of b.p. or b.p. substitute. I use Swiss FFG and sometimes, Pyrodex.
For an excellent shooting smokeless load with that bullet, a capacity load of Reloader 7
will give b.p. velocities at pressures that are safe in a '73. Alliant shows 23.5 grs. under a heavier 240 gr. bullet in the .44-40 giving 1,293 f.p.s. (24" barrel).
Have fuunnn!
w44wcf