I have a Daw 12 gauge snap action that I shoot regularly with smokeless powder. The urgency to protect damascus guns isn’t as critical as many say it is. I have several 12 gauge damascus guns and shoot them all with smokeless loads.
An accomplished gun maker and gunsmith told me of the myths of black powder only in the old damascus guns is primarily for any that are loose and out of proof. Good English damascus is strong and safe. If you ever wonder about critical barrel pressure, check out Winchester’s fiberglass wrapped barrels of the late 1950’s.
The snap action on my Daw has the catch worn down too, so the picture probably won’t help your research. I have hunted and shot it for years with no concern about the catch being worn..
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