I don't know the twist rate of your H&R, but my Marlin has a 1:38 twist and it does not shoot bullets heavier than 240 grain worth a hoot. My data is therefore around 240 grain jacketed bullets. My M1894 shot best with H110/W296. It was through this sequence of cartridge testing that I determined that W296 and H110 were the same thing as the velocity difference per grain was inconsequential. Hercules, now Alliant 2400 is and was excellent powder in this cartridge. Elmer Keith used it in his super hot 44 Specials, back in the 1920's, and when the 44 Magnum was introduced in the 1950's, that is what he used in his revolvers. The classic Elmer Keith 44 Magnum load is a 240 grain bullet with 22.0 grains 2400.
Anyway, I recommend W296/H110 for rifles but understand, you can't cut the powder charge. With H110/W296 it is either full magnum loads or nothing at all. Since you will be using this in a rifle I assume you will want all the velocity you can get.
Code:
[SIZE="3"][B]M1894 Marlin Ballard Barrel[/B]
240 Speer JHP 22.0 grs 2400 CCI 500
21-Dec-01 T = 54 °F
Ave Vel =1747
Std Dev =21
ES =68
Low =1717
High =1785
N =7
240 Nosler JHP 24.0 grs W296 WLP Fed cases
23-Mar-05 T = 65° F
Ave Vel =1725
Std Dev =7
ES =21
Low =1715
High =1736
N =5
240 Nosler JHP 24.5 grs W296 WLP Fed cases
23-Mar-05T = 65° F
Ave Vel =1752
Std Dev =12
ES =28
Low =1735
High =1763
N =5
240 Nosler JHP 24.0 grs H110 WLP Midway cases
23-Mar-05 T = 65° F
Ave Vel =1710
Std Dev =3
ES =9
Low =1705
High =1714
N =5
240 Nosler JHP 24.5 grs H110 WLP Midway cases
23-Mar-05 T = 65° F
Ave Vel =1745
Std Dev =12
ES =45
Low =1723
High =1768
N =10
240 Rem JHP 24.0 grs H110 WLP Midway cases
23-Mar-05 T = 65° F
Ave Vel =1719
Std Dev =10
ES =29
Low =1705
High =1734
N =10 [/SIZE]