Originally Posted by Perry M. Kissam
Okay, here I go with a question that to me is NOT dumb. Just ignorant of the true definition of a "self opener and assisted self opener." Will someone please explain to me with a degree of courtesy to one asking a question that is usually shown by most on this board just what exactly IS a self opener? Does it just open after both barrels have been fired or does it drop open with the actuation of the opening lever.......What?? Thanks in advance for an answer. I have to admit I have seen this phrase applied to guns for years and have always wondered what it meant but never asked until now. Forgive my ignorance on the subject, but I would now really like to understand the term. Thank.

A Beesley patent (Purdey is perhaps the best known 'true self opener'. Push the opening lever, and it opens smartly, ejecting any spent cartridges if applicable. No manual pressure is involved, and for a right handed shooter, this can be done whilst the right hand holds the gun at the wrist - meanwhile the left hand is getting the next one or two cartridges from the belt/pocket.

Video here.