If the big boys come out 5 to 10 min. sooner they would not be big boys. that is how they got that way. you can not hunt a big buck the way you hunt a 1/ 1/2 yr. old deer. Do I know the solution no I don't even with 42yrs of hunting under my belt. does anyone know the solution no they don't if they say they do they are either lying or just trying to impress someone. The only thing I can say is hunt the Pre-rut and Rut as much as you can that is the only time a mature buck will let his guard down chasing does. some big boys even do that under darkness and become almost unkillable under legal taking. good luck and just stay at it. remember it is called hunting for a reason.