Many guys stagger the pin size from smaller to larger. larger for longer shots smaller for closer shots. Rob will probably pop in but I believeI remember that heshoots .010 pins.
It's actually the opposite of this. I use .019 for my top two pins and .010 for my bottom 3. Smaller pins cover less of your target (which will appear smaller at longer ranges). Passthru is correct.
.029 is pretty big. I wasn't even aware they made one, LARGER.