Pistol vs Carbine Ballistics

What kind of ballistic advantage does the pistol caliber carbine offer over the pistol? We find out...






Test Guns:
Smith & Wesson M&P 9 4.25" Barrel Length
Marlin Camp Carbine 9 16.5" Barrel Length
Feather Industries AT-9 17" Barrel Length
Kel-tec Sub2000 16.1" Barrel Length

Ammo Tested:
Factory Ammo Specs -- Remington UMC 9mm 115 Grain FMJ
Velocity: 1145 FPS
Energy: 335 FT/lbs
Factory Ammo Specs -- Speer Gold Dot 9mm 124 Grain +P
Velocity: 1220 FPS
Energy: 410 FT/LBS
Factory Ammo Specs -- Winchester USA9MMVP 9mm 115 Grain FMJ
Velocity: 1190 FPS
Energy: 362 FT/LBS
Data:

4.25" M&P 9: Factory Stated Gain
UMC: 1109 FPS 313 FT/LBS 93%
Speer Gold Dot: 1236 FPS 420 FT/LBS 102%
16.5" Marlin Camp Carbine 9:
UMC: 1237 FPS 390 FT/LBS 114% Gain/Pistol 23%
Speer Gold Dot: 1350 FPS 501 FT/LBS 122%
WWB 1326 FPS 448 FT/LBS 124%
16.1" Kel-Tec S2K:
Speer Gold Dot: 1370 FPS 516 FT/LBS 126% Gain/Pistol 32%
WWB 1370 FPS 479 FT/LBS 132%
17" Feather Ind. AT-9:
UMC: 1305 FPS 434 FT/LBS 130% Gain/Pistol 41%
Speer Gold Dot: 1475 FPS 598 FT/LBS 146%
WWB 1394 FPS 496 FT/LBS 137%