Shotgun patterns & consistency
Try shooting the yardage
Try shooting the yardage, shell and target that will be used at your turkey shoot match. Affix the target to large paper or cardboard for larger shot size and distance to better see the pattern if need be. If you shoot at a night shoot you might see a big change as you line up the big three, rear sight, front sight and target. So try to be as close as you can to your shoots set up and the time of day it happens. The explosion of the burning powder creates moisture which lubricates the inside of the barrel. Use cotton swabs or a piece of an old t shirt on a string with a lead fishing weight and pull it through the barrel.
Your targets should look like these to be consistent. Every now and then you are going to get a bad shell or just not cut the bulls eye. You think! Is it me, the shell, or is it the gun? Well which is it! Maybe it's just bad luck. Consistence still wins. Stay on center and don't chase that pattern. Even a blind hog can find an acorn every now and then.