In my state on WMAs its rimfire only so its 22 mag, 5mm or 17HMR and alot of us down here use rimfire magnums and have very good luck with them. Its all about shot placement for sure! I try for head and neck shots drops them in there tracks and shoulder shots inside 100yds. you get some runners but just like deer hunting with behind the shoulder shots you get some that run aways. I like the rim mags because most of my calling shots are 50yds. or less and I don't like tearing up the hides. A 22 mag 33gr. V-max works great drops them in there tracks no need for a 22.250 and the like. Another thing I like about the little magnums is there report is very mild that means I can shoot a bobcat and move maybe 200yds. and setup again can't do that with the bigger centerfires. ~marco