In the early 80's I wrote a letter to Tom Roster (remember those) asking him for advice on how to open a pattern on a Parker F/F without reaming the chokes.  He suggested just cutting the petals off the wad to allow the pellets to scrub the bore and deform them enough to open the pattern.  I still have the letter but have quit obsessing about chokes although I will say that it did open the pattern 10-15% but only really worked with 8's or 9's.  For me spreader loads are not worth the effort.
		 
		
		
		
		
		
		
			
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				Wag more- Bark less.
			 
		
		
		
		
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