Big Jim...... split finger, 4\8" nock height, 2 string nocks, 51# 21st century longbow with strike plate built out past center and arrows(Victory 450 29") are bare shaft tested and part of my tuning was building out past cent in small increments, great arrow flight. 250, 200, 175gr field pts. 30" Beman 400's also have nock sound on strike plate. Shot some woodies last night and had no nock sound. Playing with everything now..pt weight, brace height, nock height, pushing out and bringing in strike plate. A bare shaft has no nock sound hitting strike plate, but a fletched shaft does? Orientating fletch differently to see if that works.