The tightest patterns I've seen on paper were out of my .044 Sterly.  I can't imagine. 039 in a 28 gauge.  Is it possible that the shot gets deformed enough that it begins to throw fliers which spread the pattern?
		 
		
		
		
		
		
		
			
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				"Striving to become the man my dog thinks I am"
			 
		
		
		
		
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