7 X 7
Most importantly is to not shoot it too far until it' s broken in. Limit your shots to about 50 yards and work your way out to longer distances over the next 50 rounds or so and you should be alright.
LOL!
Seriously, I agree with Thunderchicken about breaking it in cleanly. I like to smear a film of moly on the bullets, too. Can' t really prove if the moly (grease) really does anything or not, maybe I just like the additional smoke. Oh well.
Have fun with it, treat it right and it should last a lifetime.