Make sure your barrel is very tight.If the barrel twists under the load of recoil,this can also cause what you experience.My mossberg loves 2 3/4 BRI's from both Federal and Winchester.100 yard groups are alittle over 2".Rifled barrels have great potential.It will come together for you.
Last edited by Game Stalker; 07-17-2010 at 07:13 AM.