Rugers can be a little finicky, I have 4 of them, three are great one not so much. Before buying a new barrel, I'd float the barrel & shim the bolt .... cheaper than a barrel. You could also send your barrel to CPC. 77/22 triggers are pretty good albeit heavy. I use the factory sear and lighten the spring a bit. There's going to be tons of overtravel, but that will be the case regardless of trigger kit.
Good Luck and Good Shooting
-g
