The factory loaded 25-06 accubonds from fed are listed as 3100 fps with a 24'' barrel. Got some to try in 28'' prohunter. Just guesssing, but should pick up 50-100 fps with longer barrel. I know this is a reload thread but sometimes I have had better luck with fac. than handloads. Sometimes accuracy and velocities are hard to match with handloads, again sometimes handloading is a must.
good luck, DM