22-250 is a VARMINT cartridge! Will the 55gr. bullet do the job on deer hit in the head?
Probably, yes. Neck shot, maybe. But why? Why is it folk got to try these dang fool stunts to see how small a cartridge/bullet they can use to dispatch an animal?
For varmints a 22-250 is okay. For deer, use a proper deer cartridge! The animals deserve our best, not the least we can figure to get away with.