I have seen places where people have 5m versions of the standard 10m AP and AR targets. I think they are simply the 10m targets reduced by 50%.
However, for the average person shooting at home (inside), it will be a LOT easier to find a clear 5 meters to shoot in than 10 meters, so I see the value in keeping the range at 5 meters.
On the 10m AR target, you don't aim at the 10 ring (you can't see it anyway), you aim at the black bull. When you aim, you center the black bull in the center of the front aperture which is centered in the rear iris. Works quite well. The issue again becomes the size of the bull. If significantly larger or smaller than the regulation target, then the size of the front aperture has to be changed to be correct for the new bull size.
My trap issue is mine. My 10x10 silent trap is squeezed into the low end of the crawlspace of my home. I don't have any more vertical space to make it bigger.
airgunandy is correct, I can shoot my match AP in the match AP section. Soon as I finish my exam :-(
CG, I wear TRI-focals. I had to get a special pair of glasses made for me to shoot AP. w the tri-focals, I could not focus on the front sight.