I don't want to confuse the issue, but with that said, I've found quite a bit of variation in copper surfaces which results in what works on one call may not work on another. As a general rule, I carry both soft and hard woods for working copper. I like walnut, red cedar, mulberry and cherry as soft woods and Brazilian cherry, osage orange, yellowheart, chinaberry, hickory, purpleheart, paduk, black locust, maple, persimmon, pink ivory, bocote, bubinga, verawood, Brazilian walnut, mtn. laurel, boxwood, rosewood, black & white ebony, ironwood, marblewood as a hard wood striker. The important thing about copper is to keep all skin oils off the call, condition it frequently, and wipe it w/ a soft cotton cloth. Because it's a soft
call surface,relative to other surfaces, you need to condition your striker more frequently for it to run properly.