I did two strings and I got these numbers 1st string 37 shots hi 791 lo 779 av 784 es 12 sd 3. 2nd shot string 39 shots hi 793 lo 780 av 786 es 13 sd 3.
An ES of 12 and 13 over 37 and 39 shots is awesome! You'll have a hard time asking for better than that. Usually if a gun is within 30 ES I would call that good. 20 and under is really good. If you really got a 12 and 13 ES with any gun right out of the box that is even better because most regulators need to be shot quite a bit before the regulator "settles in" and performs it's best. It sounds like you're getting lights out performance right out of the box without needing a settle in period. Your results seem to be comparable to others that I've seen reviews of. The Mutants apparently have regulators that function at a very high level. Congrats on getting a nice gun. Now we just need pictures and a full review!!! haha
Oh , It will get better , Just get about 500 shots in and retest it, Your FPS will also go up a little with a broken in gun... This is a shorty right? Mike