i believe the katahdin only comes in .50.i have a ss 209x50 26" now,i will prob sell or trade ,but i will definately have one of these katahdin's before hunting season.
the advantage of the .45 is reduced recoil and a little more muzzle velocity with a lighter ,bullet therefore flater trajectory.
i'll stick with my .50 caliber wether it be a long one or short one.