Gentlemen:
Once again you gave me the correct direction to find the problem.
I meassure and compare the deep that a shotshell goes in 2 shotguns, one the AyA 37 with the ignition problem and the other a Winchester 101.
With the shotshells I have in hand I do this:
Brand AyA Win 101
Rio game 0.013" 0.005"
Rio Target 0.016" 0.008"
Kemen 32 0.010" 0.001"
Federal Hi Power 0.010" 0.002"
The shells go deeper inside the chamber in the AyA, as much as 0.008" and that, for sure is the cause of misfires.
Thank you!
Best,
