Firstly, wadcutters don't fly very well beyond 50yds. They're designed for a purpose and that purpose is cutting clean holes in paper at ranges 50yds and under. Although they do make a great small game bullet for those that use .32's and .38'. Beyond 50yds they become unstable and eventually tumble.
A bullet that doesn't fly well won't penetrate well either. Veral Smith optimized the nose shape of his LBT bullets for straight line penetration, a broad wound channel and accuracy. If a wadcutter did all those things well, we'd be using them. As was stated, the WFN is about as good as cast bullets get.
Ok so if you shot a deer with a WFN, picture perfect broadside double lung bowhunting shot, hit no bones except maybe a rib or two, would you expect a blood trail that you could actually follow.
And what about the same shot with a Keith SWC?
Yes to both.
