The project goal was to develop an inherently accurate and low recoil cartridge in the immensely popular .30 caliber that has more terminal effectiveness than the 5.56 while utilizing as many standard AR platform 5.56/.223 components as possible. The 7.62 x 40 WT was designed for tactical/defense applications as well as hunting for medium sized game such as deer and feral hogs. The 7.62×40 WT (Wilson Tactical) has very useful tactical applications with soft point and hollow point bullets providing reliable terminal performance on soft tissue while the Barnes TTSX will easily penetrate tough barriers. For hunting the 7.62×40 WT vastly outperforms the 5.56 and is on par with the 6.8SPC at ranges out to 175-200 yards. The VERY mild recoil of the 7.62×40 WT also makes it ideal for female and younger shooters as well as anyone that’s recoil sensitive.
The 7.62×40 WT is based on the inexpensive and readily available 5.56×45 Nato cartridge case. The 5.56 case is shortened to 1.560” and then re-sized (single operation) in a standard 7.62×40 WT sizing die which results in a formed 7.62×40 WT case with a finished overall case length of 1.565”. The cartridge is designed for 110-150gr .308” diameter bullets loaded to supersonic velocities, but if chambered in a 1-8 twist barrel is also suitable for heavy bullet subsonic use also. The 7.62×40 WT was designed around an optimal overall cartridge length of 2.250” which is a perfect fit in the new Lancer L5 AWM magazine and allows for proper case neck to bullet fit. Therefore the barrel throat was optimized for this overall length and the 7.62×40 WT does not suffer from the same inconsistent accuracy issues in the AR platform often seen with the 300 Whisper and 300 BLACKOUT. The 7.62×40 WT only requires one unique component, the barrel to build. All other standard AR platform 5.56 caliber components are compatible. The 7.62×40 WT will function reliably with standard unmodified Lancer L5 magazines if downloaded to 17 or 24 rounds or Wilson Combat has modified Lancer L5 AWM magazines with 18/19 or 28/29 round capacity available that function ultra reliable. Wilson Combat would like to express our gratitude to Kurt Buchert for all his early development work on this cartridge.
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