I've got a 455 Varmint and actually just replaced the trigger. I was waiting for the Mr Fly trigger but decided to go with Rifle Basix. Was able to install it myself with minimal effort (first modification I've ever done) and have my trigger at about 1lb though it can go down, and was set by default, to 10oz. Easy to install if you have a Dremel tool, solid, and love the feel. Just my 2 cents and offering another option should you decide to work on the trigger. Enjoy!