If there are still does going into heat the dominant bucks will retain their antlers, their testosterone levels are still up. When the testosterone drops, their antlers drop. A few years ago my wife and I were in Cades Cove in the Great Smokey Mountains in March. All but the two dominant bucks had lost their antlers and those two big boys were chasing a few left over hot does.
In the last month or so around here we haven't seen any deer movement but yesterday morning I saw 4 large bucks together, none had antlers and on my way to town and back I saw about 8 or 10 different deer, some in groups, some single but all were moving at mid day and none had antlers.