With xm193, the limitation is the ammo. It's doubtful you'll be able to do better than 1 moa with any barrel. So i guess the bottom line is, you can do 1 moa on a good day.
Kind of goes against the idea of getting the match barrel to begin with.
...Slow, deep breath in followed by two quick, shallow exhales, then one long breath out. It should sound like "HEE HEE HOOOOOOOOooooooo...HEE HEE HOOOOOOOOooooooo". Once your comfortable with that breathing pattern, try to sync the tempo up with your heart rate. "Lub-dub...HEE HEE HOOOOOOOOooooooo... etc". ~ CBruce