According to Tom Ondrus, the first Red Lable rifles were made by Paul Jeager for Bill Ruger himself. Ruger intended to make the rifled barrel sets available for sale with the Red Lable shotguns, almost from the beginning. Tom had one of the original 20 or so that they built in 45/70 on twenty gauge actions, for sale when I visited with him. If I could have afforded it at the time, I would have bought it. I think he was asking $5500. for it at the time. He told me that they had also made up one gun in 300 H & H but Paul Jeager said he would never do another on on that caliber, not that the Red Lable couldn't handle the strain, but because it was too hard to get it properly regulated. They will hold up if you get them properly converted.
If I were to do another one I would hold out for a blued model, I wouldn't chance it with a stainless one if I could help it.