Hi Marcus, wny hunter here also. 270 is plenty of gun for the deer around here and the ammunition is fine. I have found that even though areas have opened up for rifle (and I use one) the distances are still fairly short due to trees and brush.
I believe shot placement is key no matter what your pointing at the target, have you decided on optics? For what its worth i suggest not going to high in power I like a 1 to 4 x and its usually set at 1 for the areas I hunt, i just dont get a chance to take long shots.
Well no matter what you decide good hunting this season, its really feeling like fall out there and it won't be long now.