I'm absolutely with Quickrick, if Ruger said not to use them, it's soley to be a butt-cover. If Stingers have been out for going on 30 years, NO MANUFACTURER of arms is going to ship a gun that is seriously vulnerable to excessive wear from any commonly used ammo. If you're worried about it, go to Brownell's and order Volquartzen pins, bolt, springs etc. to protect against premature wear.
I use Stingers and Velocitors exclusively in my 1911 conversion kit, it has a buffer, no signs of excessive wear after 1000s of rds. They are the ones that will cycle the slide reliably. (Come to think of it, since I broke it in, I can't remember if I've ever had a stoppage of any kind with CCI hyper-vel.)
Look at it this way. If you shoot a lot of .22, it's probably to save money in the first place. You might as well make the most of it. Like someone else said above, the worst that might happen is some parts will start to wear out after 58,000 rounds instead of 60. Or you might never see any wear at all. My dad proudly claims; "I've probably shot 100,000 rounds through that 10/22, and even cleaned it once or twice." I think a lot of other factors are going to wear it out before hot ammo.