I have never..ever...ever...shot a deer over scent. I had just about given up on them until some provinces banned the use of them (which is usually the best indication that they work). But I don't plan to buy any again.
I've spent a small fortune on gadgets and gizmos over the years; some were useful - most weren't.
My advice...do your scouting... Pick a spot where there is clear evidence of deer activity (the more recent the better), keep the wind in your face and SIT STILL!!!
As the allure of hunting big whitetails becomes more and more a passion for many, we are finding that the recent (historically speaking) popularity of hunting deer from a tree stand is becoming the way to do it. I'll make no statement either for or against that technique here. This will be simply an essay on what I feel are some outstanding rifles for tree stand use.
Before we go even one more step, let's all remember that safety is first and foremost for anyone wanting to hunt...