We’re starting a new project at – The Great GunAmerica Ammo Adventure. Each week, we’ll take an in depth look at a specific cartridge. Not a brand, but a specific brand, model, caliber and loading. Ammo performance is a tricky subject, and just because brand “Mega-Doom Blaster Expander” works great in the 9mm +P loading doesn’t mean that the .45 ACP ++++P+++++++ load works properly. With that said, we’ll take an in-depth look at velocity, consistency and performance in ballistic gelatin where appropriate. Want to see your favorite load in an upcoming weekly installment? Let us know in the comments…

Sig Sauer Elite Performance 300 Blackout Match SubsonicThere’s not much that the Sig Sauer folks aren’t making these days, except, perhaps shotguns. I’m guessing that’s only a matter of time. One of the relatively new projects from the Sig Sauer team is a line of premium ammunition. Given the recent launch of the new MCX rifles in 300 Blackout, it follows that one of the first ammo offerings would be in that caliber.

I got my hands on several boxes of the Sig Sauer 300 AAC Blackout Match Grade cartridges. The first 300 Blackout offering from Sig is subsonic and makes use of Sierra’s 220 grain Matchking projectiles. Rated at 1,000 feet per second at the muzzle, it delivers 488 foot-pounds of muzzle energy.

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