Barnes’s Pioneer line brings lever‑gun reliability and all‑copper lethality to the classic .357 Magnum cartridge. Each round feeds smoothly from tubular magazines, cycles cleanly through revolvers or carbines, and delivers rapid, six‑petal expansion that retains 100 % of its weight for deep, straight‑line penetration on deer‑size game or defensive threats. Tuned to full‑power ballistics—about 1,265 fps from a handgun barrel—this load offers flat trajectories and field‑proven terminal performance without the risk of lead fouling.
 
Key Features
All‑Copper XPB Bullet: solid‑copper hollow point opens into six cutting petals while maintaining full weight for dependable penetration.
Lever‑Gun‑Friendly Design: cartridge overall length and flat‑nose profile ensure flawless feeding from tubular magazines.
Reloadable Brass Cases: Boxer‑primed, low‑flash, clean‑burning powder keeps chambers cleaner and supports multiple reload cycles.
Lead‑Free Construction: meets restrictive‑area hunting regulations and reduces airborne lead at indoor ranges.
 
Specifications
Model Number: 32141
Caliber: .357 Magnum
Bullet Weight: 140 grains
Bullet Style: XPB solid‑copper hollow point, flat‑nose profile
Muzzle Velocity: 1,265 fps (handgun test barrel)
Muzzle Energy: 498 ft‑lbs (approx.)
Case Type: Brass, Boxer‑primed
Rounds per Box: 20
Intended Use: Medium‑game hunting, backcountry defense, personal protection
 
Competitors
Federal HammerDown .357 Mag 170 gr Bonded HP – lever‑gun‑optimized bonded bullet for deep penetration.
Hornady LEVERevolution .357 Mag 140 gr FTX – Flex Tip bullet safe for tubular magazines with similar velocity.
 
Applications
Medium‑Game Hunting: copper petals and full weight retention ensure ethical, through‑and‑through performance on deer and hogs.
Backcountry Defense: flat‑shooting energy and barrier‑blind expansion make it a trustworthy load for revolvers or lever carbines.
Range & Field Practice: clean‑burning powder and lead‑free design minimize fouling while replicating real‑world recoil and point of impact.
 
Barnes Pioneer .357 Magnum 140 gr XPB marries modern monolithic bullet technology with lever‑gun compatibility, giving hunters and defenders a hard‑hitting, lead‑free solution that feeds smoothly, shoots flat, and stops threats decisively.
 
Please visit the manufacturer's website for more information.