I don't but regularly talk to a older dude, who has been shooting it for years. he got a cooper , made a loong time ago, that was chambered for 17mach 4, which is what it is; a 221 fireball case necked down to 17.
he says it is so simple to handload your pills between 3600 and 4000 fps, and that it barely recoils. 400 yd shots are a snap, and all types and sizes of varmints, and the only thing he shoots now, is the 17mach 2 rimfire, and then this, and if he needs to go for deer sized game or bigger, then he picks up a 30 cal weapon. He says that basically , the 17m4 has taken up all his other weapons between the 17m2, and his bigger centerfires. It just does everything well, with much longer bbl life thant the 22250. 220 swift, 204 ruger, and especially the 17 remington, which is what he started with.