I picked up a Marlin XT 17 today, the one with the adjustable trigger and bull barrel. I also mounted a Tasco 3-9x50 scope on it for now. So far I only have the CCI 17gr game points for it, and that's probably what I'll sight in with. My question is should I zero at 50 yards and then shoot for groups at 100 yards? What kind of bullet drop should I expect at 100, if any at all.