In a lot of instances a cheap shell will run at a much higher pressure to achieve the same velocity than a much more expensive round that was designed for fine game guns. Cheap shells are expected to make every type of shotgun work without a burp and catch flack if they cause problems in the finickiest auto. Nobody expect RST's, Gamebore or Vintagers to run in a 3.5" semi auto.
. No, but I use RST shells for 90% of my side-by-side shooting, targets or game or even varmints- But they work just fine in my Mossberg 835 12 gauge UltiMag pump gun for crows and other camo needs shotgun work- slicker than snot on a Tiffany glass doorknob..
