been turning lot cocobolo lately,, here is a 3in copper glass got out sunday ran it was cold and snowy lol
https://www.youtube.com/watch?v=079g-f3_sXc
check out my sound clips lots different calls here
https://www.youtube.com/channel/UCB6UxOSgHc6At6K63WpvpFg
copper glass
(http://i67.tinypic.com/2rzrs0k.jpg)
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I really like the sound of copper pot calls. I don't know what it is exactly about the 3 in size but they do sound the best.
Copper for me has a softer younger sound with less rasp ... I agree copper makes a good call..