RE: What effect does a hard winter have?
I know what you are saying. It would be hard to get quantitative data on wintering stress and corresponding antler development. Here in NE IA, we have had (and its not over!) about twice as much snow, and it has been here about twice as long, as any one of the last five years. I was getting used to only one month of significant snow cover, now it looks like we probably will have closer to three. Would this reduce anter size 10%? Or perhaps only 5%...which I am not sure I would notice.
I would love to see b&c record book entries on a county by county basis around here, and compare that to inches of snow on the preceeding winter. However...there would be many other variables to somehow exclude, like # of hunters, conditions in hunting season, etc..