Interestingly enough, most people I talk to pattern their shotguns to look at the density of shot on the target .
I have never worried so much about the density as the point of impact itself .
I recently took s gun (along with three others )to the range with a new to me barrrl on it , that I had traded fir a fixed choke barrel .This one has a " dial a duck" adjustable Lyman choke on it .
I was able to hit very with The other three guns as well as the my 20 double I brought as s baseline ( in case it was s bad day shooting for me!)
This particular Wingmaster however seemed to be hard to hit with ( I shoot thrm very well normally ) and when I did hit with it , it seemed that I was not where I was supposed to be!
Soooo, off to the pattern board with it - sure enough , the danged thing's pattern Center is about 1 1/2 feet off my point of aim at 37 yards!
It seems the choke may be installed a tad off Center!!
I will do some precision measuring to check for sure if the barrel is not bent but I am also going to set it the choke differently just to see if that makes a difference as well.
In any event we have the technology and tools to fix it!
Cat