1000 Round Case – 300 Blackout 123 Grain FMJ Magtech Ammo – 300BLKB

Magtech .300 BLK 123gr FMJ is a standard weight FMJ load suited for suppressed SBR use, home defense rifles, and subsonic shooting. At 123gr — the most common weight for this caliber, balancing velocity, recoil, and terminal performance. Full metal jacket — no expansion, consistent penetration, and reliable feeding in semi-autos. The standard for range training and high-volume practice. Brass-cased for reliable feeding and easy reloading — the standard for range use and carry. This 1,000-round case is sized for range sessions and bulk stocking.

.300 BLK is a widely tracked caliber on SendRounds, used for suppressed SBR use, home defense rifles, and subsonic shooting. Prices are tracked daily across active retailers. We include estimated shipping when retailer inputs are reliable, so you see more than the headline price.