"The sixth cartridge of the less than desirable Ackleys is one from a logjam of three, the 6mm Remington Ackley with the 75 gr. bullet, as mentioned above. Here we find the standard factory 6mm Remington sends off the 75 gr. bullet at 3400 fps, and the Ackley only gets 3600, for a gain of 5.9%. This is close to the 6% required by our rule, so some shooters might decide to chamber for this one. And this particular cartridge shows that some cartridges are better with one weight of bullet than with another. The 100 gr. in the Ackley is not good, but this 75 gr. is perhaps acceptable."

ha! only 3600fps with a 75gr bullet! my 6AI gets the 75gr vmax up to 3850fps! 28" barrel though....