Skip to main content

Backcountry Protection with Winchester Big Bore Ammo

Pistol ammunition for any situation in hunting and personal defense.

Designed for big bears in bear country, Winchester's Big Bore ammo is a great option for big-game handgun hunting or for personal protection in the backcountry. Available for 10mm Auto, 357 Mag, 44 Rem Mag and 45 Colt guns, this round promises deep penetration, optimized expansion and reliable performance.

Big Bore centerfire pistol offerings feature a newly engineered semi-jacketed, concave hollow point that controls and delays expansion to achieve massive shock and lethal wound channels. Available in the pistol calibers popularly carried in the backcountry, Big Bore was designed to offer consistent expansion, massive energy deposit and most importantly, trusted functioning. This is ideal ammunition for hunting and personal defense applications.

Winchester's Big Bore ammo
Winchester Big Bore: Backcountry Bear Protection

Big Bore Ammunition Features

  • Available in 10 mm Automatic, .357 Magnum, .44 Rem Mag, and .45 Colt
  • Reliable expansion on big game and for personal defense situations
  • Newly engineered concave hollow point
  • Deep penetration of semi-jacketed hollow point design controls expansion

Learn more about Big Bore in the attached video with Winchester's Nathan Robinson and Game & Fish Editorial Director Adam Heggenstaller at SHOT Show 2023 in Las Vegas. Learn more:

Cartridge: 10mm Automatic

  • Bullet Weight: 200 Grain
  • Bullet Type: Jacketed Soft Point
  • Muzzle Velocity: 1175
  • Muzzle Energy: 613
  • Rounds Per Box: 20

Cartridge: 357 Magnum

  • Bullet Weight: 157 Grain
  • Bullet Type: Jacketed Soft Point
  • Muzzle Velocity: 1460
  • Muzzle Energy: 748
  • Rounds Per Box: 20

Cartridge: 44 Remington Magnum

  • Bullet Weight: 240 Grain
  • Bullet Type: Jacketed Soft Point
  • Muzzle Velocity: 1485
  • Muzzle Energy: 1175
  • Rounds Per Box: 20

Cartridge: 45 Colt

  • Bullet Weight: 250 Grain
  • Bullet Type: Jacketed Soft Point
  • Muzzle Velocity: 900
  • Muzzle Energy: 450
  • Rounds per Box: 20

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Recommended Articles

Recent Videos

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

Going to the Bank

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Gear

Advantage: Kayak

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

Bass Crash Course: How to Skip a Lure

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

Take a Swim - For Real

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

Mega Worms

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

Give Me No Lip

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

Sling a Blade

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

The No-Fail Neko Rig

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Gear

Protein Powered Ultimate Season Preparation

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Learn

Strategies for Using Moultrie Mobile Edge Trail Cams for Hunting

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Guns

Browning Auric Camo Now Featured on A5, Maxus II Shotguns

Anglers often think of jigs as bottom-bouncing baits—and they usually are. But the swim jig is a different case. This ty...
Fishing

Take a Swim

Game & Fish Magazine Covers Print and Tablet Versions

GET THE MAGAZINE Subscribe & Save

Digital Now Included!

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW THIS MONTH'S ISSUE

Buy Digital Single Issues

Magazine App Logo

Don't miss an issue.
Buy single digital issue for your phone or tablet.

Buy Single Digital Issue on the Game & Fish App

Other Magazines

See All Other Magazines

Special Interest Magazines

See All Special Interest Magazines

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Get the top Game & Fish stories delivered right to your inbox every week.

Phone Icon

Get Digital Access.

All Game & Fish subscribers now have digital access to their magazine content. This means you have the option to read your magazine on most popular phones and tablets.

To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine.

Get Digital Access

Not a Subscriber?
Subscribe Now

Enjoying What You're Reading?

Get a Full Year
of Guns & Ammo
& Digital Access.

Offer only for new subscribers.

Subscribe Now