Figured I should post back here with my experience to date.
Since starting this thread I've shot five hares in eight trips. I really felt like I was getting into the groove by the last one - I was just scanning an area of fairly thick snow-bent alder and the shape of the hare's rump was immediately obvious at about 20 metres. Despite coming across a healthy number of hares I still haven't found deep-worn runs so I suppose I'm yet to find the mother lode. All I've seen to date is individual or overlaid tracks and sparse yet regular droppings, but I've been told by the local naturalist society that this year is at or near the peak of the hare cycle so there should definitely be more of them somewhere nearby.
I recently decided I would leave my 12ga at home and hunt hares exclusively with my 22lr, for the following reasons:
- Of my five successes three were stationary when I took the shot. The two that were on the run suffered significant damage from the #4 steel shot and seemed to die painfully.
- On one trip I took a buddy along with his 22lr. He scared a hare into a run and all he could do was watch - if he were carrying a shotgun he would have taken the shot at this point - however after about 15 metres the hare just stopped and froze on the spot. It didn't even move when his first shot sailed over its head.
- My Browning BPS isn't the heaviest 12ga out there but it's still quite tiring to lug around through thick bush.
Next time I scare one into a run and all I have is my rifle I'll try Riverratz's suggestion of whistling in the hope of getting it to freeze for a second or two while I line up the shot.
Thanks everyone for the advice