I have a B19 and I can't get it to group well at all with a scope. The group is spread in a verical line. The barrel does not seem to lock closed very tightly and it appears as if with each shot the barrel is in a different verical position, ie not closing to the same postion each time. I can feel it moving when I apply pressure to the barrel when it is closed.
Is there any way to adjust anything to get it to lock up more solidly?
Otherwise I am quite happy with it, I gave the internals a good lube with moly grease and it cocks smoothly. Shoots accurately enough with open sights.