According to their site, ruger.com, they chamber it in the Model 77 Standard model. I think they used to carry it in the Number One as well. I like the 6mm Remington much better than the 243. I have had several of each and the 6mm always seemed to perform better on deer size game. I know there is not a lot of difference on paper, about 100-150 fps. However it seemed to do much better in the field for me. I am looking at one right now in the 700 ADL synthetic. I may get it today.