40-90 Sharps BN powders?

[WCG]

Hi Guys,
Newbie question.
I have a Sharps in 40-90 BN (necked) and I have some .409" 398g bullets, but the only data I can find is for IMR4198, and that I cannot procure.
I'm looking for about 1300 fps, which is some 150fps below max, so mild but not wimpy.
Any advice on what powders would work and what to avoid

[steveu]

1fg bp is what I use. What twist is the barrel?

[Red River Rick]

88 grains of 2F.

[WCG]

Sorry, should have specified nitro/smokeless powder.
The rifle should handle smokeless as I believe it is only about 20 years old, been sitting new and unfired as nobody had the ammo

[steveu]

Twist???

[beshears]

40-70 Sharps Bottle Neck
Powder 5744
22.0 1350 fps
22.5 1374
23.0 1391
25.4 1391
Shorter case but might get you started

[WCG]

Twist rate appears to be about 1:16.5"
I'll give 5744 a try, do you get inconsistency with larger cases?

[steveu]

That twist should handle the 400-420 bullets. Good luck with your project