That`s kinda neat..been sizing the 6.5 Creed brass for my 250 AI. Works fine.
Do not disagree that the .25 cal. has been neglected for years when it comes to bullet developement, but having hunted, shot and reloaded the 250 for more years than I care to count, the .25 cal. just has not been a popular number. Hell, when I rebarreled my AI some 18 yrs ago, I don`t believe any barrel maker offered a faster twist than 10. Plus, no bullets to take advantage of the twist rate either. So up to this point, no interest in the .25.
BTB, there are a few bullets made currently that have decent BC`s, one of which I`ve used with good results on WT deer. Hornadys 110 ELDX at an advertized G1 of .465, pushed to 2975 and the Berger 115, advertized BC of .483, pushed to 2810. Have not killed anything with the Bergers, except milk jugs at 6.
My son is currently building a 257AI, 7 twist PAC-NOR. We`ll see how that works.
