Depends on the weapon I am shooting, some of them just are not as accurate as others.
If it is a Glock and slow fire hand held the 6" circle is about right but the 8" dinner plate is a good one for most days. I have done better and worse, the range I shoot at is a 25yder max
I believe is a waste of time to practice at that yardage unless you are just shooting slow fire, and want to see for fun. If you are a hunter than you need to shoot the 25 yd, 50 yd, 75 yd and 100 yd
I'll add:
The best thing to practice at is the 5,7, and 10 yd for a hand gun, do some slow fire, right, and left handed single, and then both hands on the weapon.
Semi rapid fire is the fastest they allow at the location I shoot, it is good because in a real shoot out you are going to be under anxiety and are going to be shooting faster than normal, so you need to practice slower and hitting what you are aiming at.
Sorry not asked but thought it was a good thing to mention.