440: 243 Winchester vs 6mm Remington With Ron Spomer

John McAdams sits down with Ron Spomer to talk about the .243 Winchester and the 6mm Remington (originally the .244 Remington). Both are light recoiling, flat shooting 6mm cartridges introduced in the 1950s and have similar performance on paper at first glance. However, the 243 Winchester remains one of the most popular dual-purpose cartridges in America while the .244/6mm Remington never achieved widespread popularity and is slowly fading away, despite offering slightly better ballistics. Here's the story of what happened. If you like classic cartridge history, practical hunting ballistics, and straightforward comparisons, this episode is for you. Sponsor: Join the community I'm building on Patreon to receive exclusive bonus content, like my ongoing tour of my new office highlighting lessons learned and interesting stories from past hunts. Go to BigGameHuntingPodcast.com/ebook and sign up for my free e-book on the best hunting calibers at to receive the entertaining and informative emails I send out about hunting, firearms, and ballistics every weekday. Please hit that "SUBSCRIBE" or "FOLLOW" button in your podcast app to receive future episodes automatically! Resources 5 Dying Rifle Cartridges the Industry Is Abandoning In 2026 (But Still Work) Pick up a copy of Ron's 7mm Cartridges From Around The World book here Check Out Ron Spomer's Podcast (on Apple or Spotify), Web Site, & YouTube Channel Ep 386: Brown & Grizzly Bear Hunting With Ron Spomer Ep 336: Best Cartridge For Hunting Darn Near Anything With Ron Spomer Ep 201: Bighorn Sheep Hunting With Ron Spomer Ep 145: Moose Hunting 101 With Ron Spomer