Is it OK to shot +P out of this rifle?? Also what is the best bullet weight from your experience with a 9mm carbine like this. I have a ton of 115 grain but i was thinking to go with the 124, or 147. I was going to load up a few magazines with the 124 +P for the defense end of things but when i was just plinking i was thinking of just shooting the 115 but not sure how big of a difference we are looking at with sighting in!! Was going to set the zero at 50yds, any input would be greatly appreciated!!