Winchester® Introduces the Big Bore™ Ammunition Line for Hunting and Self Defense

In the field, little is left to chance. The reliable performance of Winchester® Big Bore hunting and self-defense ammunition gives people the confidence to handle any situation.

Big Bore’s centerfire pistol offerings feature a newly designed semi-coated concave hollow point that controls and retards expansion for massive impact and lethal wound channels. Available in the pistol calibers popularly carried in the field, Big Bore ammunition was designed to offer consistent expansion, a massive energy store, and most importantly, reliable operation. This is the ideal ammunition for hunting and self defense applications.

Big Bore Ammunition Features:

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

Look for new Big Bore ammunition at a Winchester retailer or distributor near you, and for more information on Winchester ammunition products, visit

About Winchester ammunition

Winchester is the world’s largest small-calibre ammunition company and a leader in providing innovative ammunition products for hunters, shooters, law enforcement, and combatants in the United States. The 157-year-old Winchester brand is based on the integrity, hard work and a deep focus on your loyal customers. Learn more about Winchester by visiting or by connecting with us on Facebook at

Winchester: Committed to the safe, legal and responsible use of firearms

As a world leader in the hunting and shooting sports industry, and a 157-year-old brand, Winchester is committed to the safe, legal, and responsible use of firearms. Winchester works with key groups like the National Shooting Sports Foundation on a variety of issues important to our industry, including training and education, and on specific programs like Gun Owners Care and Project ChildSafe. Winchester will continue to support programs, organizations and individuals that promote hunting and shooting sports activities in a positive and responsible environment. Any use of firearms by participating youth must be done under the direct supervision of a parent, guardian, or other responsible adult.

About caring for gun owners

Gun owners care. You worry about safety. You care about preventing unauthorized access to firearms. You care about improving your community, helping those in need, and conserving wildlife and wild places for generations to come. It’s time for gun owners to tell their stories and show how they’re making a difference. NSSF®, the trade association for the firearms industry, has established the Gun Owners Care campaign to unite gun owners and the firearms industry in this common cause. Visit for more information.