I am looking for some advice on a shotgun scope. My father raised me on open sites, and I still shoot an open site 870 for deer hunting (Illinois hunter).My dad has taken some really nice deer, but last year he had to pass on a monster that was just too far for an accurate open site shot. He shoots a Rem. 1100. I dont know much about scopes and he asked me to check into itfor him. Any help would be great. Thanks