Sub-Gauge Inserts
 

I've been lookin to get sub gauge inserts for my browning o/u. anyone selling any or know where I can get some for cheap??

These aren't Briley "ultimates" but they work at reasonable distances and don't cost $1800 either: 12 gauge to 20 gauge Shotgun adapter - Short Lane Arms

I have Seminole Chamber Mates--they work really well, but if you want to use a .410 insert in your Browning you'll have to get the trigger modified from inertial to mechanical.

I tried the short chamber adapters...and they dont really work well for what I do...Im a competition shooter,sorry if I forgot to mention. The empty hulls always got stuck in the adapter. I need full length tubes and just in 20ga.

The Chamber Mates have extractors--always worked well for me in competition, but then I'm not that good...