5.56x45mm – 75 Gr BTHP Match – Frontier (FR320) – 500 Rounds

Heavy match bullets turn a good AR-15 into a capable precision rifle, and Frontier offers them at a training-friendly price. This listing is Frontier Cartridge 5.56x45mm NATO 75 grain BTHP Match ammo, MPN FR320, sold as a 500 round case. Frontier Cartridge is a Hornady brand, and this load uses a Hornady 75 grain boat tail hollow point match bullet, making it a solid pick for DMR-style rifles, service rifle matches, and long range carbine practice.

Frontier rates FR320 at 2,910 fps with 1,410 ft-lbs of muzzle energy. The 75 grain boat tail hollow point has a high ballistic coefficient compared with lighter 5.56 bullets, so it resists wind and keeps more velocity at 400 yards and beyond. The load uses military-grade boxer primers and a non-steel core bullet, so it is generally welcome on steel ranges that ban penetrator ammunition. Match bullets are built for accuracy, so treat this as target ammunition, not a hunting load.

It fits rifles chambered in 5.56x45mm NATO with a 1 in 7 or 1 in 8 inch twist, including AR-15s from Colt, Daniel Defense, BCM, LMT, Noveske, and Aero Precision, plus the FN SCAR 16 and IWI Tavor. A common question is whether 75 grain bullets work in a 1 in 9 barrel. Results vary, and many 1 in 9 barrels will not stabilize them, so test first. Another common question is whether this load cycles in a standard AR magazine. Yes, it is loaded to magazine length for semi-automatic rifles.

Frontier FR320 is new production ammunition, not reloads. Cases are reloadable brass with boxer primers, and the load is non-corrosive. This listing ships as 25 boxes of 20 rounds, 500 total, all from one lot, so the dope you record for one range session still applies the next time out. That consistency is what precision shooters pay for, and a case this size covers a full match season.