Goodguy-Actually according to several sources the dakota whitetail is about equal in size to the borealis whitetail so it would not be reasonable to say that "body sizes are comparatively small".The dakota whitetail is found in alberta,saskatchewan and manitoba in locations that extend north of the area of ontario that you speak of so the north south idea would not explain why ontario deer wood be larger than western canadian deer.The dakota whitetail also has on average antlers that exceed the size of most other whitetail subspecies which is why they dominate the record books.So while our western canadian whitetails do sport larger antlers than most they also have body weights in the same class as any other in north america.One thing I would like to know is what your definition of dressed is.We never weigh deer field dressed and the only weight we normally see is at the butcher which is what we call dressed weight meaning all internals ,head,hide and legs are removed and the carcass is ready to be butchered.In this condition our local butcher has recorded deer weighing up to 206lbs with a few at 200lbs and many in the 160lb to 180lb weight.These weights are from deer weighed in at small village butcher shop(village of 400 people) and are by no means records for the province or even the region.