Had some fun with my RPR this arvo.
I put some M16A2 sights on it to play with open sight shooting.
I used the M16 carry handle as it allows me to QD the scope while still having the open sights available.
I filed the front sight post down to half its width in one plane for a more precise sight picture, and was shooting the 5" gongs at 47m, 60m and 74m with no misses. I've liked the M16 sights since I first fired an M16 in Army Cadets. The rear sight has two apertures for a precision and a battle sight, and has MoA click adjustment for elevation and wind. In theory the M16A2 sight should zero the precision sight at 300m, and flipping the battle sight up gives you a bigger aperture zeroed at 200m, or something like that, with 5.56x45mm. I'll have to see what the difference is between the two sights with the .22LR, although the battle sight is too coarse for hunting anyway. I think the precision aperture is about 2.5MoA higher than the battle sight. The apertures are supposed to be about 70-thou and 200-thou, but my fine aperture is 1.25mm, or 50-thou.
I also put a bunch onto paper at 101m with the scope mounted and shot a bunch of 5rd groups around the 1MoA area. I was surprised how easy it was to shoot quite well as with the scope so high I only have a very light chin weld. 150rds today is the biggest session I've managed since I got the rifle, and I still only have 438rds down the tube.
Because the scope mount rests in the carry handle I want to shim it to get another thirty minutes of cant (the RPR already has 30MoA) to get me out past 400m.
But I suspect I'm going to do a lot of shooting with this rifle without the scope as well