The MagTech First Defense Justice is a solid copper hollow point load that offers a harder bullet material, better expansion uniformity, better weight retention and higher velocity as well as above average penetration, accuracy and consistency across the whole performance cycle. In short: MagTech has a winner on their hands.
The details of this round are particularly interesting because they highlight what is only vaguely apparent on the surface when a new cartridge line is released: that it is better than the last iteration and is a top performer in the personal defense ammunition field.
The all-copper projectile is geared, first and foremost to retention of total weight and speed. These two factors can impact the personal protection performance of the round significantly. Yes, you start with a bit lower weight in the projectile, but it retains more weight, and the momentum of the round during impact is not slowed down due to jacket separation. The tin projectile coating offers great anti-fouling properties. The brass case that the projectile is loaded into is nickel plated for better performance as well. The bullet travels at a speedy 1148 feet per second velocity out of the muzzle: impressive for a .40 S&W.
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