Re: 6.5-06ish recommendations?
1) I`m gonna say that comparing the two cartridges shooting at the same velocity, the Ackley brass would definitely last longer as far as case life goes.
2) As far as loading ease, the 6.5-06 may be a little easier, but once the brass is fireformed for the Ackley there shouldn`t be that much difference between the two with my limited knowledge of the improved version.
3) As already mentioned, there`s less stretch with the improved.
4) On barrel length, you have already chosen my choice of length at 26 inches on a light tote about rifle. Some on here may go longer, but I wouldn`t go any shorter.
Take care, Warren.