I can tell you exactly what a 22-250 ackley will do with a 100 grain pill, 2900 FPS. I'm shooting a 22 dasher and I get with a max load 2865 with the 100 grain wildcat. kirby as far as b.c goes, I think the 90 grain sierra berger JLK are around .6. Remember the JLK had a published B.C around .575. I've been running .7 for my drop charts and have been right on. I sure would hope that going from the 90 to a 100 or 107 grain pill you would gain a 1 point in the b.c to make of for the lost speed.
I am actually very excited about the 224 AM and hope to draw a Montana Pronghorn permit again this year. This is kind of what I designed the 224 AM for. Wanted to offer legit 600 yard range in a light weight rifle with minimul recoil, even unbraked for game up to the size of small deer.
My idea was to offer the yote hunter a rifle that he could use for calling at 50 yards and the next moment reach out 1/2 mile and hammer a yote way out there with the same rifle.
I really have no idea what she will top out at. I am sure there will be some tweaking needed to try to ease those long bullets out as gental as possible yet still get as much velocity as possible.
I think it will be a balancing act between RPMs and velocity. Just need to see where they allow us to go. I know it has +3400 fps potential with the 100 gr class bullets, getting every bullet to land in a tight group all the time is the challange!!!
Will keep everyone posted.
Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.
Jimm, The 22/250 AI has a Shilen SS 24.5 inch barrel with 1 in 10 twist. The barrel used to be 25.25 inches, and was chambered for the .224 Clark for 1600 shots before being set back and rechambered to the 22/250AI.
Although I lost 450 - 500 fps by going back to the 22/250AI from the 224 Clark, the primary reason I did so was that the Rem 700 SA magazine length of 2.800 inches just isn't long enough for that case with the long heavier bullets.
However, the Rem 700 SA works well with the 22/250AI, as it feeds smoothly, and there is ample room in the magazine to chase the lands as the throat erodes.
I have just purchased a second hand REM 700 LA in 270W, and in about 6 weeks time hope that my gunsmith will have fitted the Krieger 26 inch 1 in 6.5 twist barrel and chambered it to the .224 Clark.
I will then be able to try my supply of Richards 100 grain ULD's that were built on the J4 jacket. It will be interesting to see if they hold together at the anticipated velocities of 3200 - 3300 fps. Regards, Brian.