I went back and re-read your post, and noticed you specifically mentioned 50 and 100 yds. I shoot almost all my pistols at 50 yds. and a 2" black bullseye on white paper works great for me with iron sights. I have 3 guns that when I'm practiced up will shoot under 1" a Freedom Arms .475, a T/C Contender in 50-70, and another T/C in .44 mag. The dot size may be a little different for you, but this works for me.