I've used Cheddite for oh, I'm not sure, but for 8 or 10 years. I broke my leg 13 days ago so I can't get down in the basement to check. I did a little checking and found the Cheddite primers for foreign use were never imported to the USA, so I was wrong on that count. Here's some measurements:  
  This should answer some questions. Point A is the measurement at the top of primer. Point B is the measurement taken as close to the flange as possible. 
  Primer Brand Point A Point B 
 CCI .239" .241"- 
Cheddite .238" .243"- 
Federal .242" .241"- 
Fiocchi .243" .243"- 
Nobel Sport .242" .242"- 
Remington .241" .240"- 
Rio .245" .244"- 
Winchester .236" .242"- 
Wolf .238" .242"  
  I'm not sure what a Cheddite hull measures.
		 
		
		
		
		
		
		
			
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				Paul Harm
			 
		
		
		
		
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