Jammed when new, jammed when old. Every 2 boxes get 1 jam. Would be OK if 1/500, but 1/50 - come on. Shoot skeet using the low-load piston. Clean it well. Had it professionally cleaned by gun smith - still jammed. Shoot Win AA129 - quality shells and Remington Dove loads - also good shells. jams. Shoots better when not cleaned. Ports cleaned, mag tube wibed with a silicone cloth with no lube. Still jams. Put extra shell in magazine to increase spring pressure - still jams. Cleaned spring in the stock and the tube. etc., still jams. Love the look of the gun, love to shoot it. Hate the jams. Friend shoots a gold hunter with 2 3/4 shells for skeet, it jams. Took skeet class so now I hit 25's - I know how to hold the gun. I shoot 400-500 rounds each month in a skeet league. It jams.
Remington 1100s and Barettas shoot thousands of cheap rounds without a jam and with little cleaning. I've rented them all old dirty and tired and performed flawless (Silver Dollar, FL). Its the gun. Sent it to Browning - its their issue. If it jams when it gets back, I'll sell it to you. Some must be good, some not. Too many 'nots'. Don't appear to make them anymore vs the Silver Hunter. Hmmm. Beautiful gun and am proud to carry it, constant remarks on what a fine looker it is. For $1400 I also wish it did not jam.
If you don't shoot alot, it is a fine gun.
--update - received gun back from Browning jammed once on 100 rounds. They replaced the piston. After the jam, I removed barrel, and wiped outside of magazine tube and inside of piston with my shirt (completely dry). Been through 400 rounds with not another jam. Appears fixed (or I have a lucky shirt).