Glad I don't have the silly key. shoots great, 1 issue I have with mine is that after 150-200 rounds, depending on the ammo brand & how dirty they are is that carbon/crud will build up around the top strap & forcing cone & give me some drag & eventually bind things up. Some people get difficulty with this in the chambers. Always have a brass brush along. I bought mine primarily as a training aid for my 681 as they are about as identical as you will find. (works for a 686 even better as both have adjustable sights) The Ruger MKll target is gathering dust.