Wolf Performance PolyFormance 123 gr Full Metal Jacket 7.62x39mm Ammo, 1000 rds/case – 762BFMJ

Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.

The Wolf Performance PolyFormance 7.62x39mm ammo is a steel-cased, polymer-coated cartridge chambered for AK-pattern rifles, SKS platforms, and other firearms built around the 7.62x39mm Soviet round. Each round carries a 123-grain full metal jacket projectile with a bi-metal jacket, pushed to 2410 fps at the muzzle for 1573 ft-lbs of energy. Wolf Performance manufactures this load for high-volume range use, plinking, and function testing where cost per round matters more than reloadability.

Performance at a Glance

Wolf Performance constructs the PolyFormance line around a steel case treated with a proprietary polymer coating that reduces friction during extraction cycles and chambering. The bi-metal jacket wraps a lead core, and ignition comes from a non-corrosive Berdan primer seated in the steel case. The 123-grain projectile exits the muzzle at 2410 fps from a standard 16-inch barrel, delivering 1573 ft-lbs of energy downrange. Wolf Performance sources components and assembles this ammunition in facilities that supply military and commercial markets worldwide.

This load ships in a 1000-round case, packaged as fifty 20-round boxes. Wolf Performance designed the PolyFormance coating to address extraction and feeding issues common to uncoated steel-cased ammunition in gas-operated rifles. For shooters running AK-47, AK-74M, SKS, or other 7.62×39 ammo platforms at high round counts, the polymer layer reduces wear on chamber and extractor surfaces compared to lacquer or bare steel.

Where It Shines

You choose Wolf Performance PolyFormance 7.62x39mm ammo when training volume outweighs the need for brass cases. The 123-grain FMJ load runs in most AK-pattern rifles without adjustment to gas settings, and the polymer coating cycles reliably in direct-impingement conversions built around the 7.62x39mm cartridge. Berdan-primed steel cases are not reloadable, so this ammunition is consumed at the range. The $0.36 per round case price makes it suitable for breaking in new rifles, running drills, zeroing irons or optics, and function testing magazines.

The bi-metal jacket and lead core produce standard penetration on paper, cardboard, and soft targets at indoor and outdoor ranges. Muzzle velocity of 2410 fps duplicates the ballistic arc of most surplus 7.62x39mm loads, so you sight your rifle with Wolf Performance and expect the same holdovers when switching to other 123-grain ammunition. The non-corrosive Berdan primer eliminates the need for immediate post-range cleaning of the bore, though the steel case itself may leave residue in the chamber that wipes away with a bronze brush.

Cleaning & Storage

Store this ammunition in the factory case, away from moisture and temperature extremes. Steel cases resist corrosion better than brass when exposed to humidity, but the polymer coating can become tacky if stored above 100°F for extended periods. After firing, clean the chamber and bore with standard copper solvent and a bore brush — the bi-metal jacket leaves copper fouling similar to brass-jacketed projectiles. Inspect extractor claws and firing pin channels for carbon buildup every 500 rounds when running steel-cased ammunition exclusively.