Some interesting chronograph data comparing the .30 carbine in the Ruger revolver and the M1 carbine:
JACKETED FACTORY .30 Caliber Carbine Ammunition In Revolver and Rifle
Ammunition__________Ruger 7-1/2”______________US M1 Carbine 18”
LC44 Ball M1__________1586 fps , 20 Sd, 46 ES______1981 fps, 20 Sd, 56 ES
WCC44 Ball M1________1527, 21, 58_______________1960, 23, 89
PPU 110-gr.SP__________1321, 30, 84______________1903, 25, 84
Norma 110-gr. SP_______1490, 35, 96______________1960, 18, 59
W-W 110-gr. HSP_______1300, 29, 79______________1894, 18, 63
Federal 110-gr. SP______1414, 22, 54______________1959, 16, 56
Column Means________1439 fps Avg. REVOLVER_____1943 fps Avg. CARBINE
Velocity increase of carbine over revolver = +504 fps
Table 2 – Cast Bullet Loads in Ruger Blackhawk Revolver and US .30 Caliber M1 Carbine
Ammunition__________Ruger 7-1/2”______________US M1 Carbine 18”
Accurate 31-087B
7.8 grs. AutoComp_____1502 fps, 19 Sd, 52 ES_______1759 fps, 5 Sd, 23 ES
10.8 grs. Alliant#2400__1458, 31, 84________________1705, 46, 145
15 grs. IMR4198______1176, 38, 99________________ 1543, 32, 136
Accurate 31-100T
7.8 grs. AutoComp_____1527, 11, 29_______________1692, 16, 54 Most accurate load
14.0 grs. IMR4227_____1524, 12, 35_______________1858, 13, 33
14 grs. IMR4198_______1178, 52, 125_____________1538, 22, 50
Accurate 31-114D
14 grs. IMR4198__nose too fat to fit revolver cyl._____1515, 26, 91
Accurate 31-120TG
10 grs. #2400_________1310, 36, 77______________1590, 22, 68
73 de KE4SKY In Home Mix We Trust From the Home of Ed's Red in "Almost Heaven" West Virginia