Country of Origin: Sweden, United States
Production History:
Designer: FFV Norma AB
Designed: 1984
Produced: 1984-Present
Specifications:
Case Type: Rimless, straight
Parent Case: .30 Remington
Bullet Diameter: 10.16 mm (0.400 in.)
Neck Diameter: 10.70 mm (0.421 in.)
Base Diameter: 10.81 mm (0.426 in.)
Rim Diameter: 10.85 mm (0.427 in.)
Rim Thickness: 1.40 mm (0.055 in.)
Rifling Twist: 1 in 15
Case Length: 25.20 mm (0.992 in.)
Overall Length: 32.00 (1.260 in.)
Case Capacity: 1.53 cm³ (24. gr H2O)
Primer Type: Large Pistol
Maximum Pressure: 258.55 MPa (37,500 psi)
The 10mm Auto (also known as 10x25mm) is a semi-automatic pistol cartridge developed by Jeff Cooper and introduced in 1983 for the Bren Ten pistol. It was initially produced by the Swedish ammunition manufacturer FFV Norma AB. When it was introduced, it was loaded with a 200-grain full-jacketed bullet with a truncated cone shape. It was designed to be a medium-velocity pistol cartridge with a flatter trajectory and greater range than the .45 ACP and have greater stopping power than the 9x19 Parabellum. Norma's goal for the 10mm Auto was for it to be a powerful round with the flat trajectory and high energy of a magnum revolver cartridge while having a shorter, rimless case that was able to be chambered in semi-automatic pistols. The 10mm Auto never attained the same level of popularity as the 9x19 Parabellum, .45 ACP, or .40 S&W cartridges mainly because the muzzle blast and recoil that a full powered 10mm Auto load produces are more of an issue than with other common handgun cartridges. It also generates a high pressure of 37,000 psi with a maximum pressure of 44,400 psi, which means its in the same league as some rifle loads. The F.B.I. considered adopting the 10mm Auto in the late 1980's but after testing the 10mm, they concluded that it had excessive recoil. The size of the 10mm cartridge also meant that the frames of the guns that chambered it would be larger in size meaning shooters with smaller hands would have difficulty shooting this round. This led to Smith & Wesson creating a shortened version of the 10mm Auto with a lighter load which today is known as the .40 S&W cartridge. The .40 S&W cartridge produces less recoil than a 10mm Auto and also gave shooters with small hands the ability to shoot a smaller framed gun with near 10mm performance Although the 10mm Auto has undesirable recoil and high chamber pressures, it offers a flatter trajectory and higher amount of energy than many other pistol cartridges. The 10mm Auto is used today mostly for hunting medium-sized game at moderate ranges and it also makes an ideal combat round due to its stopping power and performance with expanding-type bullets. There are some firearms chambered for the 10mm Auto such as Glock's Model 20. Despite the F.B.I. replacing it with the .40 S&W, many law enforcement agencies continue to use the 10mm Auto today.
Ballistics:
Velocity (fps) Energy (ft.-lbs.) Barrel Length. (in.)
Bullet Wgt. (grs.) Muzzle 50 yds. 100 yds. Muzzle 50 yds. 100 yds.
155 1125 1046 986 436 377 335 5"
170 1340 1165 1145 680 510 415 5"
175 1290 1140 1035 650 505 420 5.5"
180 1030 970 920 425 375 340 5"
200 1160 1070 1010 495 510 430 5"
Mid-Range Trajectory (in.)
Bullet Wgt. (grs.) 50 yds. 100 yds.
155 0.9 3.9
170 0.7 3.2
175 0.7 3.3
180 1.1 4.7
190 0.9 3.8
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| 10mm Auto Cartridge Dimensions |
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