The Buffalo Bore Heavy 10mm Auto 200gr FMJ is a 20-round box of full-power 10mm ammunition loaded at standard pressure (Buffalo Bore part no. 21A20). Buffalo Bore built its Heavy 10mm line after years of customer requests to bring out the full potential of the cartridge. The 200-grain full metal jacket bullet is rated at 1,200 fps and 639 ft-lbs of energy. Flash-suppressed powder means the shooter’s vision is not materially affected in low light. Buffalo Bore says the loads are safe in any standard 10mm pistol.

Key Specifications

• The chambering is 10mm Auto, loaded at standard pressure.
• Bullet weight is 200 grains, paired with a full metal jacket in this load.
• The bullet is a full metal jacket, a non-expanding design.
• Rated muzzle velocity is 1,200 fps, a full-power rating.
• Rated energy is 639 ft-lbs, the published figure for this load.
• Buffalo Bore measured 1,223 fps from a Colt Delta Elite with a 5-inch barrel.
• It recorded 1,198 fps from a Glock 20 with a 4.6-inch barrel, a shorter-barrel result.
• The powder is flash suppressed, so the shooter is not blinded in low light.

Frequently Asked Questions

Is this safe in any 10mm pistol? Buffalo Bore says these loads operate at standard pressures and are safe to use in any standard 10mm pistol, provided it is a normal operating pistol in good condition.

Why do I see large velocity spreads from my autoloader? Buffalo Bore says full-power 10mm ammunition can open the breech early in some guns, which raises extreme spreads, and suggests installing a stiffer recoil spring if spreads exceed 50 fps.

Does it use flash-suppressed powder? Yes. Buffalo Bore says it uses flash-suppressed powders so the shooter’s vision is not materially affected in low light.

Buy the Buffalo Bore Heavy 10mm Auto 200gr FMJ, 20-Round Box

Buffalo Bore’s Heavy 10mm line was built to show what the cartridge can really do. This full metal jacket version is the non-expanding option at 1,200 fps. Browse more handgun ammunition from our Lubbock, Texas gun shop and order for fast, insured shipping to your door.