I have used my benchrest rifles as varmint rifles with great success. Super accuracy, mild recoil due to heavy weight, simply wonderful. After building my first "dedicated ground squirrel" .223 A/R build (Heavy-wall receiver, Krieger 26" Varmatch barrel w/brake, Jewel trigger, PRS stock) and setting it up to shoot off my benchrest rifle rest, I came to quickly realize that the very slight accuracy gain of the bolt guns is flushed down the toilet in terms of kills made by the A/R that wold not have been made by the bolt gun - the followup shot. Any squirrel or prarie dog hunter knows that at long distance with any weather moving, you are going to miss a lot. I can aim on a squirrel a friend is shooting at, wait till he fires and if he misses, I can shoot, miss, and shoot again with mental hold changes to result in a hit before my partner can reload and get back on target. I don't know how many times I have shot at squirrels and hit them on the third and sometimes fourth shot as they are running for the hole. A heavy gun, with top-end barrel and trigger, tuned to load, with a brake, shot off a rest (not bi-pod) enables you to just follow the squirrel as you lay down fire, never losing sight picture and seeing all hits and misses. Some may say that is just "spraying ammo" and not relying on marksmanship. In my book, I go to kill squirrels and if I can shoot all of the 1,000 rounds I take, I know I had a good time. Ironically, the percentage of hits is higher with the A/R due to the ability to get off the faster second shot when shooting out past 300-400 yards when the wind is constantly changing, mirage changes, etc. I'd go for the .223 shooting 40 grns out to 400, then to 50 grns past that. The little pills fly all over - but the fast second shot is what does it. I also use a .20 Practical which is a dream. I have tried my 6.5 Grendel. Even with a heavy barrel and brake, despite good accuracy, I think it is a poor choice due to recoil.