I sent my 1961 Superposed Broadway to Browning in Arnold, Mo for a complete "re-do." They kept the gun 18 months and charged me $1,500. The cosmetics were pretty good, but the mechanical work they should have completed was not done.
I returned the gun with a complete explanation of the issue (worn ejectors that should have been replaced). They were then "unable to replicate my problem" and sent the gun back. Through some in-depth research on the internet in Belgium, I found a guy in Browning International (FN) who, after reviewing my complete file of correspondence and documents, air-expressed new ejector parts to me at no cost.
While they were being installed by a local gunsmith, he discovered that the hammer for the lower barrel was cracked nearly through and replaced that. He also honed out the chambers.
I complained to Browning HQ in Utah but that organization merely forwarded my issue back to the crew at Arnold. They merely hemmed, hawed, and stonewalled.
You are on target in finding a local gunsmith. I surely will never again use Browning USA. Mike Miller