I took a look at the mold he is speaking of and it has a rather long bearing surface, a short meplat and a flat point. I would think it would load straight once you got it started.
My concern was it fitting in the loading area ahead of the ram. Don't know if the flat point would help or hinder with the end of the ram being cupped. I was thinking that with a loading stand,you could use a flat piece of metal, across the face of the rammer to get the boolit started. The flat to flat even aiding in starting the bullet straight.
I have a couple of different Lee .45 molds, a 190 SWC and a 230 RN. I just tried the SWC and as I remembered, it won't fit ahead of the ram in the loading port of either a Remington '58 or Colt '60. IIRCC the RN won't either. I couldn't find a loose RN just now to try, as I had toyed with this idea once but have not followed through with the loading stand, which would be they way to go in order to use them.