I recently installed a factory .22-250 barrel on my Model 11 action and am having issues with the .22-250 ammo failing to feed properly. The cartridges from a full mag nosedive and hit the face of the barrel. There is obviously some differences in the length of the loaded rounds. If I place the cartridges near the rear of the mag, they nosedive. If I place them closer to the front, they want to migrate rearward and misfeed also. Any suggestions?

Thanks,
Leon