Purpleheart on copper has never worked very well for me. I like a good hickory, padauk, jatoba, it seems that the little bit softer hardwoods play a bit better on copper. The crown on your striker has to be perfect also or they tend to skip a lot more. Copper has a great sound but they are a fussy call.
WI Youth & LTH Mentor
Dodge Co. NWTF