I bought a 12 ga. Rem. 870 turkey gun (iron sights) and an IC choke 3 years ago.  I've been shooting Nitro H510H shells and am very pleased with the gun and pattern.  
That said, I went to buy another box and the hunting store didn't have that particular load... I read the new Nitro chart and it listed H51013's as one of two options, so I bought a box.  However, both recommendations list a Rhino or Jebs 660 choke.  So question 1, does anyone have experience shooting that load out of my set up and if so how did it pattern?  #2, since it's been so long since I've been to this site (once I got my gun set up I was "good to go") any recommendations based on new shells, new etc.?  
Thanks