I have a lead only 655 madd Maxx choke will it shot hevi 6 with out harm? These were made before the hevi craze I believe
			
			
			
				Do you have a pic of that choke and a number on it. ???  I might have some info for ya. I have one and it has
MD100 on it
			
			
			
				Md1001
			
			
			
				I have a choke that is similar to that one. My choke is 20 years old and has the MD 100 number on it. It throws an awesome pattern with the Hevi #6 shot. I spent several days searching for one for the Father in-law ( he was not getting mine). Found one for 15.00, He shoots the 3.5 #6 out of his 870. That thing puts up 210ish in the 10 at 40. 
			
			
			
				I have a Madd Maxx M-1008 - Invector +.  I loved the former Winchester Extended Range turkey loads.  This choke would should great patterns with #6's.  I shot Hevi-13 through it - very good patterns - but the patterns with the Winchester Extended Range were a bit better.  I've been trying for years to find one for my Remington.