Here is my wife's cat and my early standard grade 12 gauge Winchester Model 21 choked Modified and Full:
I finally took it (the shotgun) to where I could shoot a pattern
The cat stayed home
5 rounds, each barrel at 23 yards:
Modified Barrel:
Full Barrel:
As even I can see, both barrels are shooting quite high
Likely many pellets above the paper
I am pleased to see that the barrel marked "Full" is giving a tighter pattern
I will take the above into account my next trip to the trap line.
Shotguns sure are lots of fun