Picked up a Customshop scope for 100 quid, to say I'm chuffed, working on a budget. Three shots and I had a zero at 35 yards 5 more shots and was printing nice tight touching group. Started to place paper targets and knockdowns at 10,15,20,25,30,35,40,45,50 and 55 to mark up side wheel all ranged fine and repeatable. My question is do I need to put targets every couple yards in-between the ones I've done or is that ok to get me started. Also do I need to do clicks for the distances, or can I just use mill dots for aiming. Thanks for any constructive criticism.