Contender barrels - have had 14 over the last ten years. 13 factory, 1 Fox Ridge
Encore barrels - have had 2 over the last two years. Both factory.
Out of all them, I have had one barrel that did not shoot great. It was a 30-30 Super 14 barrel. This caliber gets mixed reviews in general. My wife would look at the 30-30 groups at the range and asked what I was complaining about. I would show her a target from any of the others and say that is what I expect. So, basically the 30-30 was not that bad, just not to my standards.
Other than the 30-30, all I have had will shoot great. I have never seen a need to pay extra for a custom unless it is not a factory caliber. I would buy custom if I thought it was needed, but my money is too hard to come by to spend unless justifiable in my mind. By the way, I have never floated a forend either.
Buy it and enjoy. You could get a lemon, but the odds are good in my opinion that you will not. After all Brownings are supposed to be premium guns but I have a Browning Gold that is a jamming POS. I only have two Brownings so they are running 50-50 with me. My T/C odds have been much greater than that.