I have a 280 NEF rifle. It does not shoot great but will always keep the groups to 2 inches at 100 yards. I have never shot factory ammo in mine but it shoots pretty well with Sierra 120 grain Pro Hunter bullets. I might suggest that you take your NEF questions to www.graybeardoutdoors.com and check in on the NEF centerfire forums. They have lots of tips for accurizing the Handi rifle. Great bunch of guys as well.