Let me start by saying that I have not been building calls for a long time.... only 4 to 5 years now. I haven't stretched thousands of calls as many of you have either... I had a question about how tight you stretched calls. I think I set a new record for myself... I made 15 or so for a friend to compete with. I stretched them to 325-330. that is nearly double what I yelp on. 
While cutting them the cuts were blown way out of proportion.. Have any of you ever experienced this? Another thing that happened was the top reed had a wrinkle in it. Why would this happen? I tried crimping them hard and soft, and that did not seem to help.. Any advice? 
Thanks
			
			
			
				Better watch out you might put a eye out! Lol
			
			
			
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				Haha Lyle, I was sure to wear my safety glasses!  :icon_thumright:  
Yes I did pull some back tension in them. 
			
			
			
				lol, sorry, I read your question wrong, thats why I deleted my answer : ) Hope you work it out.
Mark