I'm going to have to agree to disagree with everyone saying it doesn't matter with a cantilever scope. I have two, one on a 1187 and another on a Mossberg 500. Everytime I remove the barrel I always check to make sure I'm good. Like I said in my earlier post, 1. it'll only take a few shots to make sure your sighted in, if your worried about the cost of a fewslugs maybe you shouldn't hunt, and 2. You owe it to the deer. Thats just my 2 cents......