Are you guys hammering the coins cold? Or do you heat them to red and hammer while the coin is hot. Or do you anneal the coin and then hammer...annealing as necessary?
NSBrown, you are confusing silver with iron and steel, silver works very well cold, there is no need to "heat them to red and hammer while the coin is hot". I've never had to anneal silver....
Chris, the quarter is fine, but I was replacing original inlays on original rifles both times I used dimes. The wrist escutcheons in both cases were simple ovals about 5/8 of an inch by 1/4 inch and quite thin when filling the original inlet. Sorry, I should have stated that. (Insert "embarrassed" icon here.)
I made copper a pin for one and got fancy and made a pin from a piece of a quarter on the other so I guess you could say I have used a quarter.