Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For shooters running Lee-Enfield rifles, SMLE variants, or sporterized 303 British platforms, the Remington UMC 174-grain Full Metal Jacket represents a reliable, affordable option for range sessions and training drills. 303 British ammo in this weight class has served military and sporting riflemen since 1889, and Remington’s UMC division continues that lineage with non-corrosive primers, reloadable brass cases, and consistent muzzle velocities across lot runs. This load exits the barrel at 2475 feet per second, carrying 2366 foot-pounds of energy — sufficient for steel targets at 200 yards and paper at extended rifle ranges.
Built for the Box
Remington loads the UMC line in its U.S. facilities, prioritizing manufacturing efficiencies that lower cost without sacrificing function. The 174-grain FMJ projectile features a copper jacket over a lead core, with a G1 ballistic coefficient of 0.315 — adequate for supersonic flight and predictable drop tables. Boxer primers seat flush in new brass cases, and the non-corrosive priming compound eliminates salt residue that corrodes bores when left uncleaned. Each round chambers smoothly in SMLE No. 4 Mk I actions and sporterized Ishapore conversions, cycling reliably through ten-round magazines.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 303 British |
| Bullet weight | 174 Grains |
| Bullet type | Full Metal Jacket |
| Muzzle velocity | 2475 Feet Per Second |
| Muzzle energy | 2366 Foot Pounds |
| Rounds/box | 200 Round (10 Boxes of 20) |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Ballistic Coefficient (G1) | 0.315 |
| Intended use | Range & Target |
| Manufacturer | Remington |
Remington packages this load in a 200-round bulk configuration — ten 20-round boxes — reducing per-round cost for shooters who burn through multiple magazines per range visit. Brass cases retain their integrity through multiple reloading cycles, and the standard Boxer primer pocket accepts common large rifle primers. For more 303 British ammo options across bullet weights and manufacturers, review our category index.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Follow the four universal rules of firearm safety: treat every firearm as loaded, never point at anything you are not willing to destroy, keep your finger off the trigger until ready to fire, and know your target and what lies beyond it.
- Verify current federal, state, and local ammunition laws before purchasing — age restrictions, magazine capacity limits, and import prohibitions vary by jurisdiction.
- This ammunition contains lead components. California Proposition 65 requires disclosure that lead exposure causes cancer and reproductive harm. Wash hands after handling ammunition and spent cases.
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