The 30-06 Akl improved would shoot up with a 300 win in a rifle.
Not in any 30-06AI that I've seen...and I own one. My .30 Gibbs with more case capacity than the AI won't even match the .300 Winny Mag....close but no match. The WSM and WM are virtually ballistic matches but the WSM operates at much higher pressure.
If you want a Magnum in the Encore platform...go .300 Win Mag. KYODE has one and can give you some velocity data.