This 223 Rem cartridge is from Remington’s UMC line of ammunition, and is cost-effective because UMC focuses only on making a select range of popular ammo. Its 55 grain projectile is technically a metal case, but it’s in no way functionally different from a full metal jacket. That means you can count on it to leave your bore free of lead residue, and to function positively in your AR-15 as well. This round’s brass casing is fresh from UMC’s factory and ready for handloading once fired.
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