Then you need at least a 26".I'd like to get the full velocity of my .25-06.
It doesn't list .25-06 as a caliber they offer.
The reason I say 140 fps is because I am exactly 70 fps lower per inch with my 22" barrel compared to 24" barrel listed velocities. So for my rifle I know that in going to gain 70 fps per inch. At least with this Marlin barrel I have now.