As an update I am still disappointed with the B40. The FPS after a few hundred shots barely breaks 650fps with a CPL 7.9 gr. The RWS Super HP will go 740 average and group well. The CPL will not group less than 1 inch CTC even at 8 yards. Crow Mags seem to group the best but only give me about 615 FPS.
The trigger settings just flat suck. I ended up drilling a hole through the guard so that I could get to the screws better. I added some Teflon tape to the screws to keep them in place, then actually added a little weight to the trigger as it was at about 4 ounces or less to pull. Also the loading port/breech is full of oil of some sort that I and clearing out about every 30 shots. I like the scope, much more clear than the leapers or Barska scopes and it has not budged even a little since I mounted it.
I opened up the loading port a l;ittle and it really help, does anyone have the break down for this gun?