Barnes Pioneer 357 Magnum ammunition pairs proven TSX bullet technology with handloading precision designed for lever guns and revolvers. The 140-grain TSX hollow point drives deep penetration and consistent expansion on medium game, and this load cycles reliably through tubular magazines and traditional revolver chambers alike. Whether you're hunting with a classic lever gun or depend on a magnum revolver for hunting or sport shooting, Pioneer ammo delivers the terminal performance and feeding reliability that separate quality ammunition from commodity rounds.

The TSX bullet construction—a solid copper projectile with a hollow cavity—manages both expansion and weight retention in real-world hunting conditions. That matters when you need a second or third shot to count. The 140-grain load balances velocity and recoil for fast, controllable follow-ups from lever actions and revolvers, and the ammunition is engineered for smooth feeding from the most finicky tubular magazines.

This is a 20-round box, so you get a usable hunting pack—not oversized bulk. It's the kind of ammunition you load into a hunting trip knowing your gun will run and your bullets will do the job when the moment comes.

Key Features

• TSX solid copper bullet with hollow point cavity for controlled expansion and deep penetration
• Optimized for reliable feeding through lever gun tubular magazines and revolver cylinders
• 140-grain weight engineered for 357 Magnum performance in traditional firearms
• Loaded for consistent velocity and recoil management between shots
• 20-round box format suitable for hunting and sport use

Specifications

Caliber	357 Magnum
Bullet Weight	140 grains
Bullet Type	TSX FN (Tipped Solid eXpanding, Flat Nose)
Rounds Per Box	20
Brand	Barnes Bullets

Frequently Asked Questions

Will Barnes Pioneer 357 Magnum ammo feed reliably in my lever gun?

Yes. This ammunition is specifically engineered for smooth feeding through tubular magazines in lever actions and chambers efficiently for fast follow-up shots. The flat nose design and loading specifications support reliable cycling.

Can I use this ammo in a 357 Magnum revolver?

Yes. Barnes Pioneer ammunition is designed for both lever guns and revolvers chambered in 357 Magnum, so it cycles and chambers safely in either platform.

What is the TSX bullet and why does it matter?

TSX stands for Tipped Solid eXpanding. It's a solid copper bullet with a hollow cavity engineered to expand reliably on game while retaining weight for deep penetration. This construction delivers consistent terminal performance on medium game at typical handgun hunting ranges.

Is this a full box or sample pack?

This is a 20-round box—a standard hunting or sport shooting pack, not a bulk case or sample quantity.