DD. In commercial rifles its about a dead heat. My Speer manual gives the 260 an edge of about 70 fps. However in their test rifles they used a Swede in the Ruger with a 22 inch barrel and the 260 was the Remington with a 26 inch barrel. Therefore Its to close to call. Both of these calibers deserve to be ten times as popular as they are. Its an injustice to the American shooters that more companies don't offer more options on these two calibers. OF COURSE, if they did then I would be forced to buy them.