Request a manual from Ruger on their web site.
No such model. There was a SP101; 100-300
A call to Ruger will get you the answer.
15 or 25 yards
125 or so
100-250 USD
A 22 caliber pistol holds a dose of 22 caliber ammo.
Narrow down your request please. Rifle ie 10-22, pistol, etc..
50-200 USD
Depends on EXACTLY what you have, condition, accessories, box, papers, age, etc..
You are aware that Ruger has made .22 caliber rifles, pistols and revolvers? You have to give information to get information.
You need to contact Ruger. You may have a prototype