Have a pair of BG1.0s, bought just before the 2.0 arrived. Mine have been stone reliable; can deal with the double action only trigger, but the ergos of the grip aren't as good as the newer guns.
Now, as far as your problem:
-does the firing pin move freely, with no gritty feel when moved by hand?
-does the firing pin safety move freely?
-depress the firing pin safety, and push the firing pin forward manually...does it protrude what seems a reasonable distance?
-what kind of ammunition are using? is it factory, remanufactured, or handloads?
-does the slide go fully into battery? do the rounds plonk smoothly?
Tell us more.
Moon