I've always figured a 22-250 was about like a 7 mag. Better little guys for the job, and alot better big guys for the job. Bout like anything based off the 06' case.. But thats just me, I still like Roy's redundant offerings, which still haven't been topped by any commercial offerings...
Buy a 243 and don't look back for coyotes. You want a rat gun, buy a 204.