Nice Job! Looks Great. One thing you might find is that with a shorter barrel, they really don't do well with higher charges. Like my little carbine, accuracy actually falls off with anything better than 80 grains. Its almost like the short barrel doesn't give the powder time to completely burn. Like most is wasted. I don't know I can't explain it. If I charge that .58 with 90 and up it shoots worse than it does with 80 grains. I need to try the white paper on the ground trick I read about here. But since you are using pellets you might try getting some 50gr eq. pellets and some 30 grain eq. pellets. that way you can play around with the charge. Just my rambling .02
"You're so drunk you cant hit nothin, In fact you're probably seeing double"...."I have TWO GUNS one for each of ya"