Mine worked as it should.
Dave-yes you have to eject the adapter, pop the spent case out of it, and then reload. However, there are adapters for some 30.06's that stay in the weapon and allow you to fire .308 without messing with the adapter again. Haven't used them though.
I suppose one could buy several and load them into the weapon, they may not feed well though.
It's a nice option to have to put an animal down when you don't need another full bore shot. Also, would let you fire some weapons more if you have to use an indoor range that prevents you from using the standard caliber (it is slow to load though).
Good versatile product to have.