Re: .22-6MM Ackley Improved cartridge lenght?
Case max and Trim length are always the same as the parent cartridge, with the Ackley Improved style cases.
The Loaded cartridge length depends on your magazine length, and if you are seating the bullets off of the lands. Rule of thumb for general seating depth is one caliber deep into the neck, so you would be seating the bullets .223" into the neck and then taking an overall cartridge measurement.
hope this helps,
(sorry, I don't have a manual with me to give the exact measurements.)