Short range = .22 Hornet (<150yd) 35gn Vmax
Mid range = .222 (150-300yd) 50 gn Vmax
Long range = .22-250 (300-500yd) 52gn HPBT match Sierra
Longer range = .25-06 (500-700yd) 100gn HPBT match Sierra
Occasional way out there = 300 WinMag 110gn
As for the range finder, it is an excelent tool for learning to read distance. Many times while P-dog hunting, one ranges, the other shoots then trade. Other times, every man for himself. I generally find that misses occour on "abnormally sized critters" ie, large P-dog at a great distance looks like a small dog closer etc. Use the range finder to avoid these misses.
As for the bipod, I have both and find that I keep the swivel base locked nearly all the time, if you are on unlevel ground, the legs themself are adjustable, so I see little use for the slight amount of cant the base allows.
Back to the guns, if you are looking for an allround great varmit gun, it is hard to beat the 22-250, everyone has their favorite, thats mine.
~z