Remington knives made by Camillus have either 440A or possibly 420HC, depending when they were made. I think Cam. has switched over to 420HC for most new production, but I could be mistaken about the Rem. knives.
There are also some Chinese made Rems on the market(chi-rems?) and they don't say what stainless is used, only that its 400 series. Not sure what to make of chi-rems, or for that matter, chi-marbles. I guess it doesn't matter what I think, but it does seem that I better get used to it even if I don't like it.