Well it seems the Swedes had it right when the M96 Swedish Mauser came out but the US was hung on .30 caliber rifles. When the 6.5 made the scene US gun makers decided to go with 1-9” for whatever reason. I still remember as a kid seeing the ads for the 6.5 Rem magnum and all the hype. “Shoots like a laser”, but that was with a 120/125 grain bullet where the Swedes had it right on with 142 grain ammo, but long range shooting wasn’t at like it is today. It took awhile for US gunmakers to get it right.
