Got a crap ton of Federal Grand Slam #5's 1 5/16 ounce 3" shells for cheap so I am going to roll with these for a while.  So looking for an ideal choke combo.  I have been shooting TSS and old Heavyweight shells. So I did not need to go overly tight on constriction.  
My gun is an 870 Youth with a 21" barrel.  I currently have a Carlsons .575 and a Primos Tightwad .570 looking for at least 3 more options to hit the patterning board with this summer.  Mostly interested in personal experience if you have used this combo at any point but I'm open to suggestions. 
			
			
			
				put a factory RSFT (.572) on your list along with a Trulock .562     my 21" 870 does very well with both.   as a matter of fact they're the only Remington 20ga turkey chokes I own and I've been thru a pile of them.   I primarily hunt with #6 but have shot a load of #5's in all brands and other that LB's those Federals did really well
			
			
			
				I dont have a specific choke for ya ... but I would suggest a call to Rob Robert's in Arkansas and explain what your wanting and he should be able to help you out.
			
			
			
				Give William at Sumtoy a call,  he can definitely point you in the right direction. I would recommend the following:
Sumtoy. 562
Indian Creek 565
Jebs 570 or Pure Gold 570 or 575. 
You will have the best of the best in my honest and humble opinion. 
Have a good one and May God bless y'all, Bo 
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