300 AAC Blackout has been on the market for a while now, and for all that time the only thing Hornady has been producing for that market is a 300 Whisper cartridge. Technically they’re just about the same damn thing, but branding makes all the difference. Now it appears that Hornady has finally jumped on the 300 AAC Blackout bandwagon, but it seems they’ve simply changed the label and not the mixture. What you’re getting is the same 110 grain projectile traveling at 2375 fps as you got with 300 Whisper. With this change, that leaves Winchester as the last stubborn hold-out of the “big boys” that isn’t cranking out 300 BLK ammo as fast as they can. Moral of the story: 300 BLK isn’t just some obscure caliber anymore.