Thanks for reaching out Billy! It stands for "Union Metallic Cartridge." It's simply a brand name which Remington puts on their line of straightforward American-made cartridges. You can learn why Remington uses the UMC brand in a couple of minutes right here on this Wikipedia page: en.wikipedia.org/wiki/Union_Metallic_Cartridge_Company

45 ACP - 230 Grain FMJ - Remington UMC - 200 Rounds

Name: 45 ACP - 230 Grain FMJ - Remington UMC - 200 Rounds
Brand: Remington
Price: 115 USD
Availability: OutOfStock
Rating: 5 (7 reviews)

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Overview

Quantity - 200 rounds per bucket
Manufacturer - Remington
Bullets - 230 grain full metal jacket (FMJ)
Casings - Boxer-primed brass

Product Type	Ammo
Manufacturer	Remington
Condition	New
Bullet Weight	230 Grain
Bullet Type	Full Metal Jacket (FMJ)
Ammo Casing	Brass
Quantity	200
Ammo Caliber	.45 ACP (Auto)
Manufacturer SKU	L45AP4BC
Primer Type	Boxer
Muzzle Velocity (fps)	835
Muzzle Energy (ft lbs)	356
Attracts Magnet	No
UPC Barcode	47700475707

Use Type

Range Training

Subsonic

See More Information

Cardboard boxes are so yesterday. Today’s modern shooter demands a far classier receptacle, like the bucket that this fine Remington 45 ACP ammo comes in. Just plop this 9.5 pound pail down at your range stall with an assertive thwump and get to work!

Technically, this round’s bullet is a “metal case,” which is functionally identical to a full metal jacket. As such you can expect this cartridge to feed in your semi-automatic pistol as smooth as jazz music, and to prevent its bore from quickly devolving into a leaden mess. (You can’t expect terminal expansion for self-defense from an FMJ, though.) The bullet itself weighs 230 grains and issues out of the muzzle at 835 fps, giving it ballistic performance just like the 45 ACP has been known to give for over 100 years.

Remington’s UMC label stands for accessible pricing, but never poor quality. This 45 ACP cartridge has the brass shell casing that chambers so well and extracts so fluidly, the non-corrosive primer that sparks to life at a pin drop, and the consistently loaded propellant needed for interchangeable performance after every trigger pull. You’ll definitely want to put firing this ammo on your bucket list!