The Underwood .357 Magnum 125gr Full Metal Jacket Flat Nose load (Underwood part no. #120) is a non-expanding handgun round built for penetration. Underwood loads it with a copper-and-lead full metal jacket flat nose bullet in a nickel-plated brass case, and the maker rates it at 1700 fps at the muzzle. The flat nose keeps the bullet on a straight path through dense mass, which is why Underwood positions it for woods carry against hogs and similar game as well as general revolver and lever-gun use. Powder is flash suppressed, so low-light shooting does not cost you your night vision. Each box holds 50 rounds, enough for a real range session. It is a straightforward, hard-hitting .357 Magnum choice from Underwood.

Key Specifications

• Chambering is .357 Magnum, the revolver cartridge that also feeds many lever-action carbines.
• Bullet weight is 125 grains, a lighter weight that carries more velocity than heavier .357 loads.
• The bullet is a full metal jacket flat nose, a non-expanding design that favors penetration.
• Bullet material is copper and lead, a jacketed construction that stays intact on impact.
• The case is nickel-plated brass, which resists tarnish and helps feeding and cleanup during reloading.
• Muzzle velocity is rated at 1700 fps, a supersonic speed that flattens the trajectory.
• Muzzle energy is rated at 802 ft-lbs, a useful figure for judging performance on medium game.
• Sectional density is 0.14, a number that helps explain how well the bullet penetrates for its weight.
• The load is suppressor safe, so it can be run through a suppressed revolver or carbine.
• Each box holds 50 rounds, a full range-day quantity.

Frequently Asked Questions

Can I shoot this in an ultra-light alloy revolver? Underwood says the ammunition itself is safe for ultra-light alloy revolvers, but those guns are light enough that the recoil can make bullets jump the crimp, so Underwood does not suggest firing this load in them.

Does this bullet expand? No. It is a full metal jacket flat nose, a non-expanding bullet designed for penetration, and Underwood lists it for medium game.

What kind of powder and primers does it use? Underwood loads it with flash suppressed powder in new, non-corrosive, boxer-primed, reloadable brass cases.

Buy the Underwood .357 Magnum 125gr Full Metal Jacket Flat Nose Ammunition

If you want a .357 Magnum round that prioritizes penetration over expansion, this Underwood load delivers it in a 50-round box. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more handgun ammunition while you are here.