I was looking at his site, looks like very nice moulds. I would order one in a heartbeat if I knew what size to order. I may try the .595s from TOW, but have a feeling it will be a very tight fit in this barrel, even though I shoot .535s in all my .54s. I think the smaller grooves in an odd number in this barrel will make a .010 to .015 smaller ball optimum. Another thought I had was getting the barrel recut to .62, not sure if Getz or Rayl could do that or not. I know they can recut barrels, but am not sure if they can enlarge it by a small increment without the rifling causing problems. Will be anxious to hear how your mould works out for you.