I read the sticky post on the "Best rifle/caliber rifle" and didn't see a answer to my question, Sorry if its already here. I'm a range shooter with my 22LR rifle. I'd like to take a single step up in caliber but keep the factory ammo cost as low as possible. Hand loading is not a option. So for a rifle used solely for target shooting, what is the next step up in cost per round from a 22LR ? Thank you for your time.