Bulleted Shotshell
.45 Win Mag Performance
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.45 Win Mag Performance
The Taylor KO (knockout) Index is a measure of knock-down or one-shot stopping power in terminal ballistics, that is, the effect of a projectile once it contacts a target.  Here, the effects of .45 Win Mag cartridges, firing 260 grain and 350 grain projectiles, are compared to common NATO chamberings.

The .45 Win Mag rounds overpower the 5.56mm NATO rounds and are comparable to the 7.62mm chambering.