I think what you are talking about is the .17 Predator or .17 Tactical....I can't remember which. Lots of people are shooting that cartridge. Check with the "Woodchuck Den" on bullets and info. I would personally make sure I had at least a 1/9 twist so you can run the 30 gr bullets. The 30 gr Kindler Gold HP is what a lot of those guys are shooting and it is a coyote killer. I shoot a .17 Rem with a 1/10 twist and it will not stabilize the 30 gr but I am having great luck with the 25 gr Berger MHP. That bullet at high velocity drops them in their tracks usually. Good luck. You can ask some questions like this on the Predator Masters board and get lots of info.