JGalt
Diamond Member
- Mar 9, 2011
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I picked up some small pistol primers last weekend, so I cranked out a few .38 Special wadcutters this morning. The load was previously worked up to get ~800 fps out of a 2" barreled Colt Cobra, and they do ~900 fps out of a 6.5" barreled Ruger GP100 .357 magnum revolver.
The load was mixed cases, CCI #500 small pistol primers, a Red River 148 gr. cast 0.358" wadcutter in front of 4.0 grains of Winchester 231 powder, and an overall length of 1.232". The cases were crimped on the bullet's crimp ring.
Shooting from a sandbag rest at 25 yards, the fixed-sight Colt gave the following results:
# FPS FT-LBS PF
6 803 211.94 118.84
5 805 212.99 119.14
4 820 221.01 121.36
3 813 217.25 120.32
2 791 205.65 117.07
1 853 239.15 126.24
Average: 814.17
StdDev: 21.40
Min: 791
Max: 853
Spread: 62
True MV: 815.09
The Ruger GP100 was sighted in with some 140 gr .357 magnum loads, but hits high and to the right with the .38 Special loads.
# FPS FT-LBS PF
6 911 272.78 134.83
5 914 274.58 135.27
4 900 266.23 133.20
3 903 268.01 133.64
2 902 267.42 133.50
1 922 279.41 136.46
Average: 908.67
StdDev: 8.52
Min: 900
Max: 922
Spread: 22
True MV: 909.70
The load was mixed cases, CCI #500 small pistol primers, a Red River 148 gr. cast 0.358" wadcutter in front of 4.0 grains of Winchester 231 powder, and an overall length of 1.232". The cases were crimped on the bullet's crimp ring.
Shooting from a sandbag rest at 25 yards, the fixed-sight Colt gave the following results:
# FPS FT-LBS PF
6 803 211.94 118.84
5 805 212.99 119.14
4 820 221.01 121.36
3 813 217.25 120.32
2 791 205.65 117.07
1 853 239.15 126.24
Average: 814.17
StdDev: 21.40
Min: 791
Max: 853
Spread: 62
True MV: 815.09
The Ruger GP100 was sighted in with some 140 gr .357 magnum loads, but hits high and to the right with the .38 Special loads.
# FPS FT-LBS PF
6 911 272.78 134.83
5 914 274.58 135.27
4 900 266.23 133.20
3 903 268.01 133.64
2 902 267.42 133.50
1 922 279.41 136.46
Average: 908.67
StdDev: 8.52
Min: 900
Max: 922
Spread: 22
True MV: 909.70