The Barnes Multi-Purpose Green (MPG) .310 inch 108 Grain Flat Base bullet (brand part no. 30388) is a lead-free projectile from Barnes built for law enforcement and military-style tactical shooters, sold 50 to a box for 7.62x39mm handloaders. It uses a frangible copper-tin powdered-metal core under a gliding metal jacket, so the bullet stays intact through rough handling, feeding, and firing, avoiding the premature fragmentation that can cause jams in semi-auto actions. That reliability, paired with genuine lead-free construction, makes it a step up from typical home-cast reloading bullets for shooters who need dependable function.

Key Specifications

• The .310 inch bullet diameter is sized for 7.62x39mm and similar .30-caliber cartridges.
• A 108 grain weight keeps velocity high while matching typical 7.62x39mm bullet weights.
• The flat base (FB) design pairs with a frangible copper-tin core for consistent feeding.
• The lead-free powdered-metal core avoids traditional lead construction entirely.
• The gliding metal jacket keeps the bullet intact through rough handling and semi-auto feeding.
• Sold 50 bullets per box for handloaders building tactical-style 7.62x39mm ammunition.
• Ships at approximately 0.88 lb per box.

Frequently Asked Questions

Is this bullet lead-free? Yes, the MPG line uses a frangible copper-tin powdered-metal core rather than lead.

Why does jacket construction matter for semi-autos? The gliding metal jacket keeps the bullet intact through feeding and firing, which helps avoid the jams that premature fragmentation can cause.

What cartridge is this bullet sized for? The .310 inch diameter is built for 7.62x39mm, a common tactical and surplus-rifle cartridge.

Buy the Barnes MPG 7.62x39mm .310 inch 108gr Flat Base Bullets

Order the Barnes MPG 7.62x39mm 108gr bullet from our reloading bullets selection. Ships fast from our Lubbock, TX gun shop.