Jim gets credit for the development work of the 260 that led to its adoption as a commercial cartridge by Remington. But people forget that he also wrote about and developed a 6.5 based on an improved 250 Savage case.
That cartridge to which he also gave a cat name ,was just about identical to the 6.5 Creedmoor of today.
Creedmoor and PRC are knockoffs. Jim Carmichel’s 6.5 Leopard
https://www.outdoorlife.com/guns/6-5-cartridges-that-never-made-it/?amp
