I put in one of Mikes. Really cut down on the "clatter" and everything great. Then put in the largest of the 3 gasport inserts and got stovepipe jams, ejects but no pickup and sometimes no extraction at all. Changed out the insert to the standard again and all great again. Hunting brass is bothersome so I'm going to take the largest insert and drill it out about halfway in size between its orig size and that of the Ruger insert. Hopefully will get best of both worlds and be able to find brass without using metal detector!