Railgunner offers a very good explanation. Franklin 3, Weatherby does offer guns chambered in the standard .300 winchester mag and the .300 winchester short mag. A .300 magnum IS NOT a .300 magnum by any name as you state, regardless of it being a short magnum or not. There IS a difference between the win mag and the weatherby mag and the two CANNOT be interchanged.
ironworker, I hope this is clear now. You need to shoot .300 weatherby mag ammo in your gun, but it can be from whatever brand you prefer.
ironworker, I hope this is clear now. You need to shoot .300 weatherby mag ammo in your gun, but it can be from whatever brand you prefer.