Lets see??? How many rabbits have I missed with a 12 guage??
I've always strived to go around a 3d coarse with out any wounds or misses. I was successful one time. But that still remains my goal. You've got to temper that with how realistic the coarse has been set up. If there are shots I wouldn't take in the field, I simply realize it's more a gamesman coarse set up with more longer shots and low percentage shots I wouldn't take anyway. That doesn't mean that it isn't fun and good practice.
The better the shooters you rub elbows with and shoot with, the sooner you will see more improvement. I don't know what the hot videos are now a days, but you might want to get a copy of Masters of the Barebow. Is your form like theirs? Have someone video your form and compare it with a critical eye to what you see in them.
If your you and your friends spend more time looking for arrows behind the targets than shooting at the targets, you may be having fun but you may not be learning good form and technique. You want to find a club with some dedicated traditional shooters/hunters. Get in with them and learn if you can't get any coaching. A good coach will help you overcome the bad habits you may be ingraining now. I went around a coarse once with a stranger. Less than half way around I commented on how I blew that shot and this fellow said, yup. you didn't settle before your release, as you do on each shot and proceeded to comment on all the parts of my form. He was a compound coach and was new to traditional shooting and was paying close attention.
By focusing real hard on your group size, you may be setting yourself up for the dreaded "target panic" so many seem to suffer with. Your group size will shrink as your form improves and as you set up your bow and arrows properly. Just as someones golf game improves with good coaching and "good" practice, not just flingin arrows and ingraining errors, so will your groups shrink with a properly leaned form and practice that learns each aspect of your form until you've learned it well enough to not have to focus on it.
To answer your question. In the basement, where the shots are close, I love to hear my arrows clicking together. When shooting with friends, on one of them gets into the ten ring, I love to slide my arrow alongside. Now< I can't do that all the time, but I sure love the days when I can.
Look at a NFAA 300 target. I used to shoot a few rounds of that when I came home from work in the driveway at 20 yards. If I could hit the center ring and the next ring, I was happy. Sometimes with an end of 5 arrows, all five would be in the 5 ring. But usually there would only be 3 or 4. When there were less, it was time to go inside. So I guess my standard would be about a 6" pie plate, but striving for half that. Half that would be the average 10 ring on a 3d target and whatever range you take your hunting shots. When we were kids, Dad wouldn't let us hunt if we couldn't keep them in a 9" dinner plate. At the Rinehart 100 that may come to your area once a year, we had some young compounders following our group. Once when they got close enough to watch us, one guy commented as I was setting up a shot that traditional archery didn't have ten ring accuracy. He thought I should just fling my arrow and move on, I guess. I nailed the ten and he ate crow. We are in an era of 18 yard shots. The generations before us shot field for their game. Shots from up close to 80 yards.
x-ring = 4 cm = 1.575 inches
5-ring or center spot = 8 cm = 3.150 inches
4-ring = 16 cm = 6.299 inches
3-ring = 24 cm = 9.449 inches
2-ring = 32 cm = 12.598 inches
1-ring = 40 cm = 15.748 inches
