presdme,when i got my 10ga turkey gun i shot all the 10ga lead shot ammo i could find and the only one that would pattern good was the Winchester Supreme turkey ammo.number 5 and 6 shot does the best.this ammo is the 1300fps stuff loaded with 2oz of shot.the Remington and Federal ammo didnt shoot worth a hoot.
also i was never really happy with the way the gun patterened with the stock choke tube.as far as i am concerned the stock tube is JUNK.with the stock tube and any ammo it would blow the pattern at 30yds.why take the recoil of a 10ga if you cant shoot beyond 30yds?i went to a XX FULL COMP N CHOKE and i also had the forceing cone lengthened in the barrel
you might get a gun that patterens good for you with the stock choke tube but i dont think so.all the NEF 10ga guns i have seen needed work to make them pattern good out past 30yds but that number of guns is only 3.after the work is done and with a aftermarket choke tube you can have a true 50yd turkey gun.
forcing cone jobs run about $30.00 and a good tube runs about $50.00.im sorry to tell you about this but you might have to spend some extra money on your barrel to make it shoot and pattern good

also i have my gun setup with a low power shotgun scope.love the 10ga nef turkey gun