Never had an issue in mine. And never heard that Ruger advised against it.
Here's a direct quote from the Sturm, Ruger website concerning use of hypervelocity ammunition in their .22 auto pistols. The main reason is the recoil assembly is set up to compensate for standard or high velocity ammunition but not hyper velocity. Battering or excessive wear of the bolt stop is a primary indicator of stress by using hyper velocity ammutition.
Ruger.com FAQ wrote:
What type of ammunition should I use in my Ruger .22 pistol?
The Ruger .22 pistols are chambered only for the .22 caliber Long Rifle cartridge, standard velocity or high-velocity, manufactured to U.S. Industry Standards. Do not attempt to load hyper velocity, .22 Long, .22 Short, or any other type .22 caliber cartridge into the magazine or in the chamber of the pistol. Use of .22 shot shells is not recommended.