223 Rem – 55 Grain FMJ – Remington UMC (L223R3 / 23711) – 200 Rounds

Two hundred rounds of 223 is enough to zero a new optic, run a few training drills, and still leave some for the next trip. This listing is Remington UMC 223 Remington 55 grain full metal jacket ammo, MPN L223R3, sold as 200 rounds for AR-15 owners, varmint rifle shooters getting in practice, and anyone sighting in a new setup.

The 55 grain full metal jacket is the classic 223 range bullet. It is light, fast, and produces mild recoil, which makes it easy to watch your own hits through an optic. UMC is Remington’s value line built for dependable function rather than premium accuracy, so it suits drills, steel, and general practice. A full metal jacket bullet does not expand, so it is not suited for hunting or defense, where an expanding bullet is the correct tool.

This ammunition fits rifles chambered in 223 Remington, 5.56x45mm NATO, and 223 Wylde, including AR-15 rifles from Colt, Smith and Wesson, Ruger, and Springfield, plus the Ruger Mini-14, Remington 700 and 783 in 223, Savage Axis, Tikka T3x, and CZ 527. A common question is whether a 223 Remington bolt gun can fire this ammo. Yes, it is loaded to 223 Remington specifications. Another common question is whether 55 grain bullets suit a 1:7 twist barrel. They do. A fast twist stabilizes light bullets well, and many owners use 55 grain ammo for routine practice even when their match or duty load is heavier.

Remington L223R3 is new production ammunition, not reloads, made in the USA. It uses reloadable boxer-primed brass cases and non-corrosive primers. This listing contains 200 rounds from one lot, so your zero and function stay the same from the first group to the last. Keep a few rounds to confirm zero later in the season, after travel or after removing and remounting an optic.