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Drop-in choke gauges don’t tell you much on an old gun. They are based on a .729” bore, but guns of this era often have larger bores.
I am in full agreement. I don't know when barrel "choke" was incorporated but as I understand it, the bore restriction on the older guns could start quite a ways back from the muzzle. Inside 40 yards even cylinder bores are effective from my research.
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