No experience with the Winchester, but have been using a SA459 for a couple of years now. I have zero complaints. I have heard a lot of people say that their SA threw the ejection bolt on cycling, and several have lost the bolt. Weatherby was replacing these at no charge for a while, but I heard they have started charging for them now. I have run a lot of rounds through mine with no issue. One guy who shoots left handed, shot one and it threw the ejection bolt. He lost a tooth in the process.