Riner.... from the other post...

Sight in for 100 yards and then back track to see where your gun is at 50. If you have 200 yard shots available... site in for 100. You'll find 50 yards will still be a kill when you aim mid body on a white-tail. The 7- 9 inch kill zone should still eat up your slug at 50 yards...

I keep forgetting to saythis !!![8D] Get a range finder if you do not have one....this 150 +yard thing is a gamble without a range finder...You're going to sacrifice +/- 3 inches with out one... and it could result in a bad hit...if you don't own a range finder....don't be afraid.... you'll find time to mark the animal...if you have one... than enough said...I use a 180 dollar Nikon 400 range finder....The Bushnells were shaky for me...spend the extra 30 bucks and get a nikon...