good question, I have seven pins. heres the story.

I bought the sight got my pins out to 50yd in 10yd increments starting at 20yd. then I want more pins, so I could buy the pins individually for 4$ or I could get a 10$ plastic sight with 3 pins. so I saved and got 3 extra pins after 50yd they go 60yd 70yd and 100yd.

ya cant shoot passed 50yd any way so I figure just bottom out the pin if I'm shooting 260 fps then I need to have my 20yd pin become 30yd and so on until I get the bottomed out pin zeroed at 100yd.

I have them on there for practice, and when I camp in the rockies I keep them on there as my "survival pins", just in case.