I shoot a lot with open sighted guns. (mostly lever guns). Most of them I would feel comfortable shooting 100 yds. offhand. If I could get a good rest I would push that to 150 yds. I carry a range finder with me when I hunt. Believe it or not my most accurate rifle is a Shilo 50-70 carbine with 70 grs. ffg compressed with a 450 gr bullet. This is hunting rifles I am mentioning, I do have more accurate target firearms. At this time I only own 1 scoped rifle. Also my 75 year old eyes are not as good as they were 40 years ago. Find this a very interesting thread, looking forward to some of the reply's. Al