Well a busy day today, my son and daughter-in-law came by with my grandaughters for a visit, stayed a couple of hours then left for thier young cousins birthday party. My son is working loooong hours so I offered to finish a boat trailer he is working on. It needed to have new bunks, a winch stand with a winch, and a front jackstand attached. He has most of the pieces and they are cut to size, just a little final fitting and bolting to be done. I went to his house and picked it up after stopping at the dump and when I returned home my wife was heading out to do MORE shopping.
Home alone!! What a perfect time to open the cellar test fire range. I grabbed a couple .45 ACP reloads and attached an O-ring to each. The first I tried was the 3/8 x 1/16. It fired and the ejector worked like an extractor, lifted the case but did not shoot it out of the chamber. The O-ring was a snug fit when closing the action but no problems at all, everything worked fine.
I then loaded up the round with the smaller O-ring on it, the 5/16 x 1/16. Everything worked as it should and when I opened the action the empty shot right out and I caught it in my hand.
No accuracy testing was done but the function testing was a success. I think I would go with the smaller O-rings so the empties eject instead of just extract but it is nice having a choice. I guess with the larger of the O-rings I would not lose any empties or O-rings.
I consider my test a 100% success for function and for an emergency it would work well. Some day I will do some accuracy testing at 25 yards....<><....