Frank Lopez wrote:You can put an aiming point on the paper, but don't draw the circle until you've shot the pattern. Then, determine the center of the pattern (which may or may not be at the aim point) and draw the circle.
Like Chris, I have a big piece of folding cardboard that I cut out a 30" circle out of. My cardboard used to be a school presentation board (the ones that have a large middle and two wings that fold in). They are just big enough.
Then I do like Frank says. I have a 1" circle cut out on a piece of cardboard. When I roll up my target to shoot, I use a magnum marker to fill in the 1" on the red rosin paper. That is my aiming point. I shoot the target at the desired distance, cut it off, and move on.
When I get home, I flip the red rosin paper over. You can clearly see all of the holes coming through on the back. I use my 30" cut out circle to move it around to find the best pattern. Like Frank says, note that I find the best pattern regardless of where the 1" aiming point is on the front. I look at the pattern and its distribution, count the pellet %, and take a quick picture (I don't keep the paper). Some of the things I count and keep are the shell and choke of course, pellet distribution, the pellet % in the 30" circle, and how many pellets are in the 1" aiming point.
The reason why I do it this way is that lets just say that the middle of the 30" target on the back is 6" left of the aiming point (so I pulled the shot 6" to the right of my target (right because I was looking at the back). This could definitely happen in the field, a shot 6" too far in front of a passing bird. I want to see that even though I did not hit my target precisely, how many pellets ended up in the 1" aiming point / target. Because if I have a good, uniform patter with a sufficient pellet %, then I hopefully will still get enough pellets in the 1" aiming point to take down the bird. This of course assumes that you don't miss your aiming point by more than 15" because the pattern circles we are looking at is 30".
Anyway, this is the way I do it. Hope it helps. I also have a YouTube video on what my patterning board looks like with the roller if you are interested. I have posted it up here in the past.
Some people just need a high-five.
In the face.
With a chair.