I picked up a Remington 721 rebarreled in 375/300, which is a 300 Winchester Magnum brass necked to take a 375 bullet. It came with a set of Redding neck sizing dies and loading dies which I guess would’ve had to been custom ordered. It should make a great gun for anything on the North American continent. I have found little to no info searching forums on the cf and others about this cartridge and would like to know a little about it. If any of you gentlemen know anything about this cartridge please feel free to share your knowledge. If it matters at all, the gentleman I bought it from claimed it came from out west. With that said, it maybe something common out that way so y’all chime in. Thanks!
