Rhino/Nitro man! YOU WILL NOT BE DISAPPOINTED
This is my set-up on my 870 and next year my 11-87 will be just like it. I just dialed the Holo sight in today and I'll post a pic of the pattern right after I get some food in me. If I didn't have the Rhino/Nitro set-up! I'd be shooting the Kicks .655 or .665 using Winchester NEW Extended Range 6 shot 1 3/4oz for the 3" chamber. If shooting the 3.5" I'd go with the 2oz 6 shot loads. Shot well out of my 11-87 today
All guns like different load but this is where I'd start and if you wanted to keep the cost down to start off, go with the high velocity loads.