I went to the range today to sight in this old Marlin 30-30 my dad had from the 70's and it wouldn't sight in at all. The rifle is old and I don't know how my dad treated it when he used it. The rifle was shooting really high and I made adjustments and it was still shooting way above my target. Is it broke? What's a good scope to put on a 30-30? My buddy had see-thru scoop rings on his 30-30 and I was wondering if yinz use them. It seems nice to be able to use the iron sights on the rifle as well as the scope, even though I didn't try it out on his.