Welcome to the forum. How high is the red dot? I ran your approx 8 yard zero with a sight height of 1.5" with a 40 gr bullet with a BC of 0.125 and muzzle velocity of 1200 (pretty generic). At 16 -17 yards (50ish ft.) it should be approx 1.25" - 1.5ish" high. How does it do with the hard sights? I think you'll really enjoy the 15-22.