Barnes Pioneer .357 Mag 140gr XPB - Box of 20

The Barnes Pioneer .357 Magnum 140gr XPB gives your lever gun or revolver all-copper terminal performance purpose-built for hunting — expanding to double its original diameter on impact, retaining near-100% of its weight through bone and tissue, and engineered from the case head up for flawless feeding from tubular magazines and reliable cycling in .357 Mag revolvers.

The Barnes Pioneer .357 Magnum 140gr XPB is a hunting ammunition line designed for .357 Magnum lever-action rifle and revolver hunters who want all-copper terminal performance optimized specifically for the velocity range and feeding requirements of tubular magazine lever guns and single-and double-action revolvers.

The XPB (X Pistol Bullet) is Barnes' all-copper hollow point pistol bullet, built on the same philosophy as the legendary X-Bullet but engineered specifically for the velocity characteristics of handgun and lever-gun cartridges. On impact, the hollow point nose peels back into four sharp copper petals that expand to double the bullet's original diameter — creating a wide, consistent wound channel — while the solid copper shank drives straight and retains near-100% of the original 140-grain weight through the entire penetration path. No lead core means no jacket-core separation regardless of what bone or tissue the bullet encounters, delivering the deep, reliable penetration that makes all-copper bullets the choice for clean, ethical kills on deer, hogs, and similar medium game. Each round is loaded to specific pressure and velocity standards for the .357 Magnum platform, with careful attention to ogive profile for reliable feeding from the tubular magazines of lever-action rifles — where a pointed or fragile bullet nose can create dangerous tip-to-primer contact. The Pioneer line covers both revolver and lever-gun applications in a single, versatile load.

Caliber: .357 Magnum. Bullet: 140gr XPB all-copper hollow point. Muzzle velocity: approximately 1,695 fps (lever gun) / 1,265 fps (revolver). Muzzle energy: approximately 893 ft-lbs (lever gun) / 498 ft-lbs (revolver). Application: hunting — deer, hogs, medium game. Quantity: 20 rounds per box. Premium brass casings. Lead-free all-copper construction suitable for lead-free hunting jurisdictions.

All-copper XPB construction delivers double-diameter expansion and near-100% weight retention at .357 Magnum revolver and lever-gun velocities. The bullet profile is engineered specifically for safe, reliable tubular magazine feeding — no tip-to-primer contact risk during rapid cycling.

The definitive hunting load for .357 Magnum lever-gun owners who want all-copper terminal performance and reliable tubular magazine feeding, and for revolver hunters who want maximum penetration and expansion on medium game from a purpose-built all-copper pistol bullet.

Backed by Barnes Bullets' commitment to quality and performance. Made in the USA.