My first 22/45 was stiff as hell when I looked at it in the gun store. It was for sale on consignment really cheap. I cheiseled them down on the price quite a bit and ended up buying it for $150-$175. The seller had never disassembled it and cleaned it thoroughly, so there was a build up of varnish on the bolt. I cleaned that up and reassembled with very light lubrication and it was a different gun. Since then I have done some minor polishing and stuff (still needs a trigger job though) which has made it better. The 22/45 is normally a bit stiff at first. Triggers are a bit tricky to stone and polish, I haven't gotten up the courage to try doing mine myself yet.
There is a trick to reassembling these types of Rugers, but follow the directions in the manual and it is pretty easy once you get the hang of it.
Mine seems real stiff right after a tear down. But cycling it a couple times and it gets alot better.
I dont like how you have to dry fire it to do tear down. Mine gets stiff after the reassembly dryfire. I need to get some plastic plugs or empties for that.
I agree with everything said above. Give it a good cleaning, shooting it, and if still and issue call ruger. Mine was new and it look a few trips to the range for it to loosen up.
I also see the same thing as dalon, where it is stiff after I tear it down, but again once ai shoot it a few times it is good to go.
I have had to call ruger once (I have 6 of their handguns) and the service was great. Just as stated above,I told themtheissue, they emailed me a shipping label and I got it back within a couple of weeks.