Ruger is correct. It can have misfires, I was told by TC that its the extra weight that causes the misfires. You can take the stock hammer spring out and replace it with a 51 pound that mike belm sells and elimanate that issue and it will also elimanate and misfires with cheap ammo due to primer depth variences.
And if you dont want to go that route, yes you can put the swing hammer in a standard encore. Dont know what is all involed as mine had it installed when I bought it used. And no its not an actual prohunter, I have two of those and know the difference.