I had ask if anybody had used a 6PPC collet die on a 6X47? Well I got no response so I bought one and it works on the 6x47 and even 243 with a pile of washers. When figuring out how many spacers, I am very careful not to let the shoulder bump and change dimensions. Just takes a lot of measuring and trial and error......... but I saved $70! I do the same thing with a 222 collet die on a 223 case. The entire neck is not resized, but enough to get a uniform neck tension. I seat 223 bullets with a Forster Benchrest seater in 222 using the washers for spacers.
Bill
Bill