Barnes Pioneer .357 Magnum 140-grain TSX ammunition (part no. 32141) is built specifically for lever-action .357 Magnum rifles as well as revolvers, loading the brand’s all-copper Triple-Shock X bullet for hunters who run a pistol-caliber lever gun in the field. Barnes machines this 140-grain TSX bullet entirely from copper, with rings cut into its shank to reduce fouling and pressure, and its nose expands into four petals on impact while the shank retains essentially all of its original weight. That combination gives a pistol-caliber lever gun genuine big-game penetration. In handgun ammunition built for lever guns and revolvers alike, this is a serious upgrade over standard .357 hunting loads.

Key Specifications

• The chambering is .357 Magnum, equally at home in revolvers and pistol-caliber lever-action rifles.
• The bullet weighs 140 grains, a proven hunting weight for the caliber.
• The bullet is Barnes’ TSX (Triple-Shock X), machined entirely from solid copper rather than a jacketed lead core.
• On impact the nose expands into four petals while the shank retains essentially 100 percent of its weight, driving deep, reliable penetration.
• Rings cut into the bullet’s shank reduce fouling and pressure, a Barnes design trait across the TSX line.
• Each box holds 20 rounds, shipped 10 boxes to the case.
• Cost runs about $1.42 per round for an all-copper premium bullet.
• This load is built for lever-action rifles and revolvers chambered in .357 Magnum.
• The all-copper construction makes this load compliant in areas that restrict lead ammunition.

Frequently Asked Questions

Is this ammunition built for a lever gun or a revolver? Both, the Pioneer line is loaded for consistent performance in .357 Magnum revolvers and pistol-caliber lever-action rifles alike.

Why choose an all-copper bullet for a lever-gun hunting load? The TSX retains nearly all of its weight after expansion, giving deeper, more reliable penetration than a traditional lead-core bullet at pistol-caliber velocities.

Buy Barnes Pioneer .357 Magnum 140gr TSX

A pistol-caliber lever gun deserves a bullet built to make the most of every bit of its velocity, and the all-copper TSX delivers exactly that. Load up before the next hunt. Order from our Lubbock, Texas gun shop and it ships fast to your door.