From what I can tell RS 60 is similar to or identical to R17 and RS 80 is similar or identical to R 33. RS 62 is a unique powder not a match for any I know. RS 70 is close to the R22, R23, VV N560, MRP family and possibly slightly faster than R 25 and 26 but it is the closest to R 26 on their list.
At least for the 6.5x55 you can click the pressure arrow and get + P type loads for modern actions, a nice feature.