I am speaking for my self,I have been hunting over 50 yrs and I have taken game not just deer with a recurve,compound,sidelock,inline and savage but didn't know they took different skills to kill deer.about the only difference I know is you have to get a little closer using different weapons.I took a 11 point buck one year with a T/C sidelock with open sights a lot farther than I ever will with a savage (lucky shot).
I think as long as its legal in the state you are hunting use anything you like.
If you're using a tree stand and lets say a flintlock,how traditional is that. I never saw a pic of Daniel Boone sitting in one.
If you have all that skill and techniques that you learned just using a sidelock you shouldn't have a problem taking a little old deer.