I bought this rifle as a .22 LR with heavy match barrel. I changed the barrel to one of .172" groove diameter and re-chambered it to .17HMR.
It'sa 3/8" to 1/2" rifle at 100 meters off bags and routinely killed field rats to 282-284 yards every spring.
These, however were a closer bunch of 8 - no more than 160 to 175yards from my shooting spot.

I still have the .22 bl. of course.