When I use the red plastic baffle I don't use any washers.  The spring loaded inner tube seems to seal against the charge bar just fine.  After weighing a lot of powder charges I have found the baffle to work fine for some powders but not so well with others.  You just have to experiment a bit. 
C.G.B.
		 
		
		
		
		
		
		
		
	 |