I own a CHE 12ga #3 frame that the factory letter states 2 7/8" chambers and made for #1 shot. It is over bored in both barrels to .740/.742 and chokes of .040. I believe the barrels were overbored so #1 shot patterned properly. Any opinions on my theory?? My other possible explanation is when the gun was returned to "take dents out of barrels", the factory polished the bores by .010 and recut the chokes.
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