|7.62×40mm Wilson Tactical|
|Place of origin||22x20px United States of America|
|Parent case||5.56×45mm NATO|
|Case type||Rimless, bottleneck|
|Bullet diameter||.308 in (Script error mm)|
|Base diameter||.377 in (Script error mm)|
|Rim diameter||.378 in (Script error mm)|
|Rim thickness||.045 in (Script error mm)|
|Case length||1.565 in (Script error mm)|
|Primer type||Small rifle|
|110 gr (Script error g) Sierra HP||2,600 ft/s (Script error m/s)||1,650 ft·lbf (Script error J)|
|110 gr (Script error g) Barnes TTSX||2,400 ft/s (Script error m/s)||1,407 ft·lbf (Script error J)|
|125 gr (Script error g) Nosler Ballistic Tip||2,350 ft/s (Script error m/s)||1,533 ft·lbf (Script error J)|
|125 gr (Script error g) Speer TNT||2,400 ft/s (Script error m/s)||1,598 ft·lbf (Script error J)|
|Test barrel length: 20" for the 110gr Sierra HP, 16" for all others|
The 7.62×40mm Wilson Tactical (7.62×40mm WT) is a centerfire rifle cartridge introduced in 2011 by Wilson Combat. The goal was to produce an accurate, low-recoil .30-caliber cartridge that could be used in AR-15/M4 rifles using as many standard components as possible.
The 7.62×40mm WT is based off the 7.62x40mm wildcat cartridge, the shoulder of the WT was moved .003" forward and the throat was made .001" larger to accommodate mass-production tolerances but stay within the tolerance of the original reloading die tooling of the 7.62x40mm. The parent case (5.56×45mm NATO) is trimmed down to 1.560" and is re-sized with a 7.62×40mm WT sizing die. The overall case length after the shortening and re-sizing is 1.565". The cartridge is designed to use .308" diameter bullets in weights of 110 to 150 grains, with a standard twist rate of 1-12". Wilson Combat states that heavier bullets can be used in a barrel with a 1-8" twist rate for subsonic loads.
The 7.62×40mm WT is designed for both tactical/defense rifles and for hunting medium-sized game. In tactical applications, the 110gr Barnes TTSX bullet can be used to penetrate tough barriers, while the soft-point and hollow-point bullets provide reliable terminal performance on soft tissue. In hunting applications, the 7.62×40mm WT delivers slightly more energy than the 7.62×39mm and is similar to the 6.8 SPC and .30-30 Winchester, making it useful for game such as deer and feral hogs.
Firearms chambered for 7.62×40mm WTEdit
Since the 7.62×40mm WT is based upon the 5.56mm NATO, the only required modification to AR-15/M4 rifles currently chambered for 5.56mm NATO or .223 Remington is a new barrel. Wilson Combat offers barrels and complete upper receiver sets, with barrel lengths offered in 11.3", 16", 18", and 20".
Wilson Combat currently (2011) offers custom loaded 7.62×40mm WT ammunition with bullet weights of 110gr and 125gr, but the cartridge can also be hand-loaded using new brass available from Wilson Combat, or by using 5.56mm NATO or .223 Remington brass and the appropriate sizing/forming dies, also available from Wilson Combat.