Last year, the end of the first week of bow season here in Tenn. which would be around the last few days of September, I saw a lone 7 point walking the edge of a corn field. The deer was probably 100 yards away. I grunted at him and looked as if he ran into a wall he stopped so quick. I gave him another 2 quick short grunts, and that deer ran to within 20 yards. On the same hand, I have seen them stop and look, but never commit. So in my case, I think it's up to the deer. What mood he's in or what's on his mind. I use a Primos@ small can all the time during early season and does will respond. To answer your question, I am going to call all year from start to finish. Just not as aggressive early. But I am not going to be without a call in my gear.