Am about to built an 9mm Ar upper for plicking 50yds or less , what wt and bullet design would be a good pick 115-147 gr RN / HAP . I plan to take some factory ammo out to the range for a test drive before I start reloading ,so I can buy just what I need and the gun likes . The XL 650 is setup already with a taper resizer, hornary bullet guide seater ,taper crimper .