By pin gap being an issue I mean you could run out of room in your pin guard by slowing the bow down.
I shoot 500 gr arrows and on a 7 pin Axcel sight my top pin is all the way at the top and the 7th pin is bottomed out in the housing. If I were to increase my arrow weight much more with that sight I woudn't be able to use the bottom pin for 80 yards anymore.
Impressive. What type of setup do have slingin' those telephone poles out to 80?