Ian M what I find is that on close targets under 100yds people tend to lead them to far with high power rifles and at the longer distances they don't lead them far enought.I find that shooting runing game up close a low power scope helps like 1.5 or so. I can tell you of a shot on a running rabbit at 54 yds with a 22 brush really thick he breaks out into the open and bang flips over dead. Just last weekend I was hunting with a 13 year old never shot a deer before chased out a good doe for him flat out across a feild he pulls up say he aim at her pulled the trigger and she flips head over heels. about 75 yds. He has done abit of shot gunning and I think that helps a lot.