I recently just got an USH in a 12 gauge. The scope I put on it is called the Nikon slughunter 3-9-40 , which has the BDC reticle.
When looking at the cross hairs their is four lines or circles, the first line is a 50 yard, second line is 100 yard, the third line is 150 yards , and finally the fourth line is 200 yards. What this will do is instead of aiming six inches high at 150 yards all you do is take the 150 line in the cross hairs and aim right at it meaning it does the compensating for you. It sounds pretty complicated, but it is worth the price of admission . Also the price on this slug gun scope is 250.00 dollars, it also has a 5 inch eye relief.
Hope this helps
Buckshooter