My B14R arived about a month ago now & its been a pain. Mostly issues with aftermarket stuff, but that's kinda the point.
Right out of the box, failure to feed on the 8th round every time. The round wouldn't lift up enough & would get hung up on the inside rim of the barrel. Contacted BPI and they said it was probably the mag, they sent a new mag. I was able to cycle 50 rounds through the new mag in the factory stock with out issue. I stretched out the spring in the original mag and it seemed to help.
I swapped to a brand new Orias chassis & mags wouldn't lock in. Took chassis to a gunsmith & he opened up the spot behind the mag latch to let the latch to move back farther enabling the mag to lock into place. He said it fixed the feeding issues, although I'm not sure he checked.
I installed a trigger tech special, brought it to the range to do a covid COF & I couldn't get through 5 rounds with out a failure to feed or failure to fire followed by a failure to extract. I tried running 3 mags (30 rounds) and 2-3 rounds per mag had one of those issues. I swapped everything out back to factory, took it to the range this morning and it went through 50 rounds with no hangup.
I called Bergara & got through to someone real quick. He was apologetic but working from home & couldn't talk to a smith. So I'm now waiting to hear back about what they can do, so far their customer support seems great, but seeing as it works fine in factory the configuration so I don't really expect them to do anything. I thought the Orias would be fine seeing that they had them on some of their center fire rifles in the past. And I haven't heard any issues about trigger tech & the B14R. Now I've got my wife is telling me to ask for a refund and put in an order for a Vudoo.