The classic Keith load was 22.0 grains 2400 under one of his 250gr 429421 bullets. I am going to state that that is still a great load. Loading manuals claim that 20.0 grs of 2400 is now the maximum, and all of my data is with 1980's or 1990's 2400, I did not have a chronograph when I was shooting older 2400. They were not available. I don't know if the reduction in powder is due to better pressure measuring devices or due to a formulation change. I think it is due to better pressure measuring devices and they are telling us the powder changed to get us to cut our loads.
Alliant 2400 is a great powder because you can cut the charge without something horrible happening. I have shot thousands of rounds with a 240 L with 17.5 grs 2400 in a 44 Magnum case, and that was the load Keith shot in 44 Special cases, in vintage Colt SAA revolvers!
The best "pedal to the metal" powder is H110/W296. Both are the same powders. But, you can't cut the charges, it is full power or nothing.
I tried AA#9, it shoots well, but the powder granules were tiny, just above sandpaper grit in size, and that caused all sorts of gumming up issues with my Dillion 550B powder bar.
I will say an outstanding mid range load is a 240 L with 8.5 to 9.0 grains Unique. Powerful, accurate, less recoil and blast than the magnum.
The 44 Magnum is easy to reload with cast bullets. Use any standard primer you want, use an appropriate powder, seat the cast bullet to its crimping groove, and give a good crimp. Just roll the case mouth into the crimp groove, don't over crimp and squish the bullet.
I have included 240 JHP data, just in case. I always finished up my shooting sessions with JHP's, it pushed any lead in the throat out the muzzle. This is not recommended for heavy leading as it does raise pressures, but I never had a problem with light leading and my loads.
Code:
Ruger Super Blackhawk Stainless Steel 7.5" Barrel
250 LSWC 17.9 grs 2400 little dandy rotor 22 CCI primers
25-Nov-90 T = 70°F
Ave Vel = 1192
Std Dev = 33
ES = 90
Low = 1131
High = 1221
N = 6
250 LSWC 21.9 grs 2400 little dandy rotor 26 Fed primers
14-Jan-91 T = 50°F
Ave Vel = 1355
Std Dev = 75
ES = 186
Low = 1256
High = 1442
N = 6
240 Speer JSP 22.0 grs 2400 Lot 457 Midway cases WLP(brass)
19-Jun-11 T = 91 °F
Ave Vel = 1245
Std Dev = 17
ES = 57
Low = 1224
High = 1281
N = 10
accurate
240 LSWC 18. grs AA#9 Midway cases WLP (brass)
19-Jun-11 T = 89 °F
Ave Vel = 1254
Std Dev = 18.54
ES = 71.553
High = 1289
Low= 1218
N = 30
accurate, light leading
240 MagTech JSP 24.0 grs W296 (80's) Midway cases WLP(brass)
19-Jun-11 T = 91 °F
Ave Vel = 1351
Std Dev = 18
ES = 63
Low = 1309
High = 1372
N = 10
accurate
Code:
Three Screw Super Blackhawk 1967 mfgr 7.5" Barrel
240 LSWC 20.0 grs 2400 thrown, lot 406 mixed cases, Wolf primers
T = 80 ° F 23 April 2011
Ave Vel = 1182
Std Dev = 29.3
ES = 117.8
High = 1239
Low= 1121
N = 20
240 JHP 18.0 grs AA#9 mixed brass CCI 300
23-Apr-11 T = 80 °F
Ave Vel = 1195
Std Dev = 22
ES = 62.88
Low = 1216
High = 1154
N = 6
240 JHP Old Remington Factory ammunition
23-Apr-11 T = 80 °F
Ave Vel = 1416
Std Dev = 13
ES = 31.56
Low = 1434
High = 1402
N = 6
Code:
S&W M629-4 Stainless, 5" Barrel
240 LSWC 8.5 grs Unique thrown, Midway Brass WLP
25-Nov-04 T = 58 °F
Ave Vel = 1023
Std Dev = 25
ES = 99
Low = 958
High = 1057
N = 30
240 LSWC 20.0 grs 2400 thrown, lot 406 Midway cases, Wolf primers
T ≈ 60-65 ° F 19-Apr-09
Ave Vel = 1155
Std Dev = 32
ES = 128.4
High = 1213
Low= 1084
N = 30
250 LSWC 22.0 grs 2400 Midway cases, Fed primers
1-Oct-95 T = 75 °F
Ave Vel = 1336
Std Dev = 39
ES = 108
Low = 1286
High = 1394
N = 6
240 LSWC 18.0 grs AA#9 CCI 300
21-Oct-00 T = 75 °F
Ave Vel = 1169
Std Dev = 32
ES = 116.2
Low = 1094
High = 1210
N = 25
240 JHP 18.0 grs AA#9 Midway cases, CCI 300
T ≈ 60-65 ° F 19-Apr-09
Ave Vel = 1125
Std Dev = 26.43
ES = 86.71
High = 1164
Low= 1078
N = 18
240JHP R-P 24.0 grs H110 Midway cases WLP
9-Oct-05 T = 66 °F
Ave Vel = 1228
Std Dev = 21.47
ES = 70.16
Low = 1268
High = 1197
N= 22