Rangeball,

Sure, you can do that if you wish.
Some guys use both an up pin and a cross hair together with their competition scopes.
I have a Sight Master Elite 2000 hunting sight that has both a green cross hair and an orange up pin.
Cross hair in front with up pin behind.
Just line the up pin in the center of cross hair, works great.
That' s why guys like to dab the center of the green cross hair with an fluorescent orange lip stick when they' re not using the up pin.
On the 6lb test line...
That is the size recommended by most but experiment and get the size you can see well and works best for you.


Sag.