I Shot 3" Winchester Super X #5's for years in my 535 with a Kicks .660 choke. I killed a pile of birds with that combo. Then I jumped on the Nitro bandwagon and they recommended a Jellyhead .660 so I shot that. After I got over the hype of the 3.5" Nitro's I went back to the Super X #5's but stayed with the Jellyhead. Along came the Longbeard's and the 3"#6's had an unbelievable pattern in my gun with the Jellyhead .660 so I shot those for a couple years. Couple of years back last I had life altering moment and a friend let me try some TSS.

So to answer your question I would recommend a Jellyhead .660 and a 2oz load of #9 TSS. I guarantee you its good to 70 yards if you wanna shoot one that far. It will shoot nearly as good with the XX Full Turkey choke that comes with the 535 which is a .670 choke.