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			Mr. 16 gauge, 
 
Excellent question! 
 
We did night fire at the agency as part of our semi-annual qualification.  The muzzle flash was a surprise to most agents. 
As for low flash powders, I do not have a definitive answer.  I do know that 2400, H110 and 296 flash a lot in my .357s.  
 
I agree that a short barrel will give more flash. 
 
Adam
		 
		
		
		
		
		
		
			
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				Adam Helmer
			 
		
		
		
		
		
	
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