I have never really been happy with the accuracy of my RPRR. Someone recommended trying these in my rifle. They are made for deffenive type hand guns in.22 mag. Tried these and wow, best 100yrd groups i ever shot with it by a large margin. On a raining day with some wind, i was super impressed. Of course my target disintegrated in the rain before i got pics. I dont know if its the 45 gn bullet or they are made a little better. Just wanted to put that out there for any other . 22WMR shooters. Anxious to get out on a nice day and try them.