DF, you're mentioning Imperial Sizing Wax made me a bit nervous. Up until about 3 weeks ago I had never stuck a case in a die but, it finally happened and with my .358. You guessed it, I was using ISW.
For decades it has been touted as "the" sizing lube, so I wanted to try some. Now after getting the case out I'm back to what I've used since the '80's and will never again get a case stuck. So beware. Sorry for the hijack. Oh, the 1.5x5 looks great on your M70 and will probably meet all needs.