Winchester’s Lake City M193 loading in 5.56x45mm NATO (brand part no. WM193300C) loads a 55-grain full metal jacket bullet at a listed 3,270 feet per second, packed 300 rounds to a reusable polymer ammo can. M193 is the original military specification loading for 5.56mm, and Lake City is the U.S. Army ammunition plant whose brass and loadings set the standard other manufacturers are measured against. Winchester lists muzzle energy at 1,306 foot-pounds, and the reloadable brass is boxer-primed and non-corrosive — real numbers behind a genuinely mil-spec round rather than a commercial approximation. For shooters who want authentic M193 ballistics in bulk, this rifle ammunition delivers it.

Key Specifications

• The chambering is 5.56x45mm NATO, loaded to the M193 military specification.
• The bullet weighs 55 grains, the original M193 specification weight.
• The bullet is a full metal jacket ball design.
• The listed muzzle velocity is 3,270 fps, with 1,306 foot-pounds of muzzle energy.
• This ammunition is manufactured at Lake City, the U.S. Army’s ammunition plant.
• The case material is reloadable brass, boxer-primed and non-corrosive.
• This listing ships 300 rounds in a reusable polymer ammo can.

Frequently Asked Questions

Is this safe to shoot in a .223 Remington rifle? This is a full-pressure 5.56x45mm NATO load. It is safe in rifles chambered in 5.56 NATO or .223 Wylde, but it is not recommended in rifles chambered specifically in .223 Remington, which are built for lower pressure.

What does M193 mean? It’s the original U.S. military specification for a 55-grain 5.56mm full metal jacket loading.

Why does Lake City matter as a manufacturer? Lake City is the U.S. Army’s own ammunition plant, and its loadings are the benchmark other 5.56mm manufacturers are measured against.

Buy Winchester Lake City M193 5.56x45mm NATO Ammo Can

Genuine mil-spec ballistics in a reusable can beats a generic commercial load any day at the range. Order it from our Lubbock, Texas gun shop and we’ll get it to your door as soon as it’s ready to ship.