Frontier Cartridge Military Grade Ammunition in 5.56x45mm NATO delivers reliable, American-made performance for shooters across the spectrum—from target practice and training to field use. Built on Hornady's reputation for consistency, this XM193 55-grain load pairs a full metal jacket boat tail bullet with brass cases and military-grade boxer primers, giving you ammunition you can trust through the brass.

The 55-grain FMJ boat tail design is proven downrange: it shoots flat, groups tight, and functions reliably in modern sporting rifles and service-style platforms. Whether you're running drills at the range, logging trigger time in training, or stocking a reliable option for personal defense readiness, Frontier Cartridge ammunition meets the standard. State-of-the-art loading techniques and quality control mean each round performs like the last—no surprises, no excuses.

Brass cases and consistent powder charges make Frontier Cartridge reloader-friendly too, if you handload. The full metal jacket construction keeps velocity consistent and penetration predictable, and the boat tail profile helps with ballistic efficiency downrange. This is working ammunition for working shooters: no hype, no premium markup, just solid mil-spec performance at a price that makes sense for high-volume shooting.

Key Features

• 55-grain full metal jacket boat tail bullet
• 5.56x45mm NATO (.223 Remington spec)
• Brass cartridge cases
• Military-grade boxer primers
• American made by Frontier Cartridge (Hornady)
• Consistent loading and quality control for reliable performance

Specifications

Cartridge	5.56mm NATO
Bullet Weight	55 grains
Bullet Type	Full Metal Jacket, Boat Tail
Case Material	Brass
Primer	Military-grade boxer
Brand	Frontier Cartridge
Made In	USA

Frequently Asked Questions

What rifles does this 5.56 NATO ammo work in?

This ammunition is spec'd for any rifle or carbine chambered in 5.56x45mm NATO. It will also function in rifles marked .223 Remington, though always consult your rifle's manual. Modern AR-pattern rifles, M4 carbines, and other NATO-spec platforms will run this round reliably.

Can I reload these brass cases?

Yes. Frontier Cartridge uses brass cases with boxer primers, making them reloadable. Once fired, the cases can be inspected, cleaned, reloaded, and shot again—which makes high-volume shooters and handloaders appreciate the value.

Is this ammunition suitable for target shooting and training?

Yes. The consistent loading, reliable primers, and proven 55-grain FMJ design make Frontier Cartridge well-suited for range training, drills, and target practice. The boat tail design helps with ballistic performance, and the full metal jacket is appropriate for training environments.

What's the difference between XM193 and other 5.56 loads?

XM193 is the military designation for a 55-grain full metal jacket round. It's a baseline, proven load with a long service history. Frontier Cartridge's XM193 uses that same proven bullet design and construction, making it a straightforward, no-frills performer for shooters who want mil-spec reliability.