The Buffalo Bore Heavy .357 Magnum 125gr Barnes XPB load (Buffalo Bore item no. 19J20) is the maker’s lead-free Heavy .357 Magnum loading, aimed at full power and more. Buffalo Bore lists the 125-grain all-copper Barnes XPB bullet at 1,650 fps. Real-world testing produced 1,583 fps from a 5-inch S&W Model 27 and 2,145 fps from an 18-inch Marlin 1894. Because the long-for-weight bullet leaves no room for a bulky flash-retarded powder, the maker says to expect noticeable muzzle flash from handguns, with little to no flash from the rifle.

Key Specifications

• Caliber is .357 Magnum, in a Heavy loading above the maker’s tactical short-barrel version.
• Bullet weight is 125 grains, a long-for-weight all-copper bullet that sets the load’s power.
• The bullet is a Barnes XPB all-copper design, which makes the load lead-free.
• Muzzle velocity is published at 1,650 fps, a Heavy .357 Magnum figure Buffalo Bore measured in real guns.
• Maker-measured velocity is 1,591 fps from a 4-inch S&W Mountain Gun, with 1,448 fps from a 2.5-inch S&W Model 66.
• Muzzle flash is noticeable from handguns, because this load does not use a bulky flash-retarded powder.
• The box holds 20 rounds, a count that fits testing in your revolver.

Frequently Asked Questions

Which firearms can fire this Heavy .357 Magnum load? Buffalo Bore says it should only be used in revolvers made of all steel and should not be fired in lightweight alloy framed or cylindered revolvers, and that it may be used in all or any .357 Magnum chambered rifles.

Is this load lead-free? Yes. Buffalo Bore describes it as a lead-free Buffalo-Barnes load with an all-copper Barnes XPB bullet.

Why is there noticeable muzzle flash? Buffalo Bore says the long-for-weight all-copper bullet leaves too little case capacity for a bulky flash-retarded powder, so handguns show noticeable flash, while the rifle yielded little to no flash.

Buy the Buffalo Bore Heavy .357 Magnum 125gr Barnes XPB Lead-Free Ammo, 20 Rounds

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