New 7.62x40 WT - .223 necked up to .308

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I'll just stick to an sks with tech sights. With good ammo it will shoot with many open sighted ARs if you are proficient and practice. At 200 yards and under a deer is toast.

It seems to me all the .30 cal AR rounds do what a x39 or 30-30 does with more ammo cost unless you really like ARs.

HB
 
I'll try and find the source, but an article I read basically explained it as divergent from the AAC Blackout development. It's essentially the same as the blackout/whisper cartridge, but trades a little more supersonic velocity while giving up subsonic.
 
FWIW - http://www.wilsoncombat.com/762x40WT.htm

The 7.62x40 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 7.62x40 WT does not suffer from the same inconsistent accuracy issues in the AR platform often seen with the 300 Whisper and 300 BLACKOUT.

762x40-comparison.jpg


7.62x40 WT (Wilson Tactical)
Project Goal - 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.

Cartridge Application - Designed for tactical/defense applications as well as hunting for medium sized game such as deer and feral hogs. The 7.62x40 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 7.62x40 WT vastly out performs the 5.56 and is on par with the 6.8SPC at ranges out to 175-200 yards. The VERY mild recoil of the 7.62x40 WT also makes it ideal for female and younger shooters as well as anyone that’s recoil sensitive.

Cartridge Specifics - The 7.62x40 WT is based on the inexpensive and readily available 5.56x45 Nato cartridge case. The 5.56 case is shortened to 1.560” and then re-sized (single operation) in a standard 7.62x40 WT sizing die which results in a formed 7.62x40 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.

Ballistic Performance Comparison

7.62x40 WT (16” barrel)
110gr: 2450FPS Muzzle Velocity and 1466 Foot Pounds of Energy
125gr: 2400FPS Muzzle Velocity and 1599 Foot Pounds of Energy
150gr: 2200FPS Muzzle Velocity and 1612 Foot Pounds of Energy

5.56 Nato (16” barrel)
55gr: 3150FPS Muzzle Velocity and 1212 Foot Pounds of Energy
62gr: 3000FPS Muzzle Velocity and 1239 Foot Pounds of Energy
77gr: 2750FPS Muzzle Velocity and 1293 Foot Pounds of Energy

7.62x39 (16” barrel)
123gr: 2320FPS Muzzle Velocity and 1470 Foot Pounds of Energy

6.8 SPC (16” barrel)
110gr: 2550FPS Muzzle Velocity and 1594 Foot Pounds of Energy

300 BLACKOUT (16” barrel)
125gr: 2275FPS Muzzle Velocity and 1436 Foot Pounds of Energy
 
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