I have always used right helical for hunting but only because that was what everyone else was using. I had never heard to use right helical to keep a broadhead tight until I saw a thread about New Archery Products Quick Spin Fletching down in the bowhunting gear review forum. BOB@BBT states that he is quoting Cary J. Pickands who is Tech Support Specialist for NAP. Cary states that is why NAP designed the fletch to be placed on the arrow straight or right offset/helical. The thread is still there for you to see. Not sure I buy into all of this but regardless I will continue to shoot right helical as it has worked for me all these years.