I agree with slee about changing strikers with each call. I have DOZENs of calls like most other longtime turkey chasers but I primarily carry 3-4 slates with me (I don't use diaphrams) and with the exception of Mr. Clifft's boxes, I have rarely heard a box I liked. However with several strikers you can sound like a flock of birds with just one slate. I like to be VERY raspy while calling and have found that I can take a most any material "slate" and make it raspy with a cherry (or other dark, soft wood) striker. Even metal and glass calls. Typically I have my favorite two slates in a carrier on my belt along with 4 different strikers stuck in the carrier. I don't recall EVER sticking with a striker that actually came with a call.

Calls are like tubes/loads, don't be afraid to experiment!
RA