I am planning on moving my X-Sight to my crossbow for use on a deer damage control permit.
I would think that the hogs would figure out pretty quick that you are using a crossbow on them as well however. My crossbow (Barnett) is pretty loud.
Whatever you shoot a hog with, they will learn to associate the feeder area with danger and will avoid the area for a while.
"If your plan is for one year, plant rice.
If your plan is for ten years, plant trees.
If your plan is for one hundred years, educate children."