True ... The "Super X" counts as a tie-breaker and Vegas allows up to a 2613 sized arrow. Several of the top Pros are hitting 30 of 30 "Super X's". Fita allows the 2315 as the largest diameter arrow for the smaller 10 ring. Both targets appear similiar. Most of us use the large arrow as a strategy to qualify for the shoot-off. When inside-out 10's are in effect, then the smaller arrows might be of advantage. Shoot what works best for you. Good luck on the shooting line. The competition is getting much better.