I have been experimenting with shells with a tru-glo tube. Not having the best luck but I blame it on the tube.

Willard

Hey Partner,
I have the same choke and gun...mine shot terrible until I took the advice of a friend who is a pro turkey hunter..He told me to buy the Gobble Dot sites..They were 50.00 from Cabelas..just took 2 shells to site in..
WOW!!!! same gun ..same shells and same choke..I went from 20 pellets in the kill zone to about 200..My best shells I found for my 870 were Walmart's Remington Nitro 3 inch magnum #4 shot..9.00 a box of 10. When my wife hooks up my scanner I'll post my target..