Travis Haley is probably best known these days for his role in the Magpul Dynamics series of training videos on carbines and handguns, but the man is a master trainer in his own right who has had some time “downrange.” So when Travis Haley speaks, I listen. And today he’s singing the praises of the 300 AAC Blackout cartridge, claiming it’s even combat effective out to a kilometer, which sounds as beautiful to my ears as the overture to Beethoven’s Fidelio. Check it out the vid for his thoughts on 300 BLK.