Winchester Ammunition 5.56x45mm NATO 62 Grain M855 SS109 Penetrator Full Metal Jacket

Short Product Summary

Winchester 5.56x45mm NATO 62 Grain M855 SS109 Penetrator Full Metal Jacket is military-style 5.56mm ammo designed for reliable performance, consistent accuracy, and dependable cycling in AR-15 and other 5.56 NATO rifles. Featuring the M855 green tip projectile, this load is ideal for range training, tactical applications, and general-purpose shooting.

What Is Winchester 5.56x45mm NATO 62 Grain M855?

Winchester M855 SS109 is a 5.56mm NATO load featuring a 62 grain full metal jacket bullet with a steel penetrator core. Commonly referred to as “green tip” ammo, this round was originally developed for military use and is optimized for improved penetration compared to standard 55 grain M193 loads.

This 5.56x45mm NATO ammunition is loaded to NATO pressure specifications and is designed for rifles chambered in 5.56 NATO or .223 Wylde.

Key Benefits & Features

• 62 Grain M855 / SS109 projectile

• Full Metal Jacket (FMJ) design

• Steel penetrator core

• 5.56x45mm NATO specification

• Reliable AR-15 cycling

• Consistent velocity and accuracy

• Manufactured by Winchester Ammunition

Shooters searching for 5.56mm NATO, 5.56x45mm ammo, or Winchester 5.56 M855 often choose this load for its balance of performance and affordability.

Performance & Ballistics

The 62 grain M855 offers:

• Improved penetration over 55 grain FMJ

• Stable performance in 1:7 and 1:8 twist barrels

• Reliable feeding in semi-automatic platforms

• Effective mid-range accuracy

It performs well in modern sporting rifles and is widely used for target practice, training, and tactical-style shooting.

Always confirm your firearm is chambered for 5.56x45mm NATO before use.

Typical Uses

• Range training

• Tactical drills

• High-volume shooting

• AR-15 practice sessions

• General-purpose 5.56mm shooting

Many shooters compare Winchester M855 to other 5.56mm NATO options such as M193 55gr loads or match-grade 77gr ammunition depending on their shooting goals.

Why Buy Winchester 5.56 Ammo From Primereloaders?

When searching for Winchester ammo, 5.56mm ammo for sale, or bulk 5.56x45mm NATO, Primereloaders offers:

• Competitive pricing

• Secure online checkout

• Fast processing

• Reliable inventory updates

• Trusted customer service

We ship across the United States and Canada, including Texas, Florida, Arizona, Georgia, North Carolina, Pennsylvania, Ohio, Michigan, Nevada, and more.

Whether you are stocking up on 5.56mm NATO ammo or other Winchester ammunition, Primereloaders makes ordering simple and dependable.

Frequently Asked Questions

What is M855 SS109 ammo?

M855 (SS109) is a 62 grain 5.56x45mm NATO round with a steel penetrator core and full metal jacket construction. It is commonly identified by its green tip.

Is Winchester M855 good for range use?

Yes. It is widely used for range training and general shooting due to its reliability and military-style performance.

What twist rate is best for 62 grain 5.56?

A 1:7, 1:8, or 1:9 twist barrel will typically stabilize 62 grain bullets effectively.

Can I shoot M855 in a .223 rifle?

Only if your rifle is rated for 5.56 NATO or .223 Wylde. Standard .223 Remington-only chambers may not be suitable for NATO pressure ammunition.

Is M855 armor piercing?

No. While it contains a steel penetrator, it is not classified as armor-piercing handgun ammunition under federal law. However, local regulations may vary.