Dave, thank you. Can you help me with determining if I have measured the bore correctly? I can shine a light into the breech and see a definite ridge. I can also insert a very thin metal blade into the breech and it hits this ridge at a depth of 2-3/4”. After reading many posts concerning chamber depth measuring methods am I accurately measuring the chamber depth? I have been using a 2-1/2” RST shell with 5/8” of shot and assume that if I use a 2-3/4” shell with 7/8 oz of shot I would improve my chances of hitting quail.
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