Ruger manufactures a wide range of firearms, and the appropriate ammunition depends on the specific model and caliber of the firearm in question. Typically, Ruger firearms are designed to use standard factory ammunition that corresponds with the caliber designation clearly marked on the firearm. For example, if the firearm is chambered for .22 LR, one should use .22 LR ammunition.
In addition to standard ammunition, some Ruger models may be compatible with specialized types of ammunition, such as hollow points, full metal jacket, or even, in some cases, lighter or heavier grain variants designed for particular applications like personal defense or target shooting.
It is crucial to follow the guidelines provided in the owner's manual and understand that using reloaded or non-standard ammunition can affect the performance and safety of the firearm. For more specific recommendations based on a particular Ruger model, it may be useful to consult the manufacturer's specifications on their official website or check with knowledgeable retailers who specialize in Ruger firearms.