You got that little tool kit with it right? The one that is in the black metal tube. It has this weird looking metal piece in there that I couldn't find a use for. Then I saw it on a website. http://www.gunsnet.net/Linx310/sightin.htm
Turns out it is the front sight adjustment tool. I got mine and it was sighted in close to dead on. I haven't adjusted it yet. I was just blasting, didn't feel like sighting it in right then. I'll do it when I get back.
I've been using wolf and bear ammo in the thing. It hasn't had a problem jamming in over 1,000 rounds other than those caused by a dented magazine and not enough spring tension on the drum magazine.