Looked, but didn't find any posts on this topic, maybe I didn't look good enough, so here goes...

I'd like to get some feedback on these critters. What ones are good, bad, ugly, ect... Specifically I'm looking to go with .22LR and .22 WMR in .222 Remington chamber located on a Savage 24V .222/20ga O/U with hammer. Any problems with firing pin damage and or how many rounds can one expect to get out of one of these adapters? Won't be hard use but I may get carried away!
Thanks
Mark Kw