Garth and Dean. Thanks for your posts. I am not necessarily certain that I have measured the chamber depth correctly. That is why I have asked for comments and suggestions. I do not have instruments to measure or detect any taper. I have simply measured into the point where I encounter a shoulder 2-3/4” from the breech that implies the bore diameter for the first 2-3/4” is larger than the bore diameter beyond the shoulder.
I have another 28ga Parker (vintage 1905) that has no detectable shoulder inside the bore and that would make it more difficult to determine actual chamber depth.
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