I could easily make a slick-sided mould, but I still don't believe in them. HV and slicks means bad PC fouling accumulation from what others have seen. These are heat treated during the coating, water quenched, 21 bhn stabilized. I was shooting ACWW up to 2750 with about the same results, I only hardened them as an experiment.
Last night I did some nose-sizing experimentation to see if I could get by with less sizing, and it appears I can. The throat entrance is .2263", so I'm also going to try sizing the bullets down to .226" and see if I can get them to not lead. I was able to nose bump just enough to get the bullet to engrave the lands lightly on the first two bands, not touch the third, and just scuff halfway up the fourth band. Seated like that, the gas check is flush with the bottom of the neck. My lapping bullets came in today, so I'll be playing with that a little. One thing I've noticed with this barrel is it is tight for about 2-3" in front of the chamber and then opens up slightly for the rest of the length. I bet it was profiled after broaching and the thick part in front of the chamber kept its tighter form. Mainly I'm trying to smooth it up so it fouls less and hopefully that will make the PC shoot better. After lapping, I'll re-evaluate how much nose-sizing I'll need to do because I'm sure it will push the lands out a little and probably open up the bore dimension a bit. Fortunately, there's plenty of front band diameter on this bullet to work with. Once all that's done I'll get a new jam length and nose-sizing depth established and work on the jam-minus numbers some.
I'm almost out of bullets again, so I'll cast some more out of 6/4 alloy and give that a go, and probably experiment with lube again. If all else fails, I'll just have to live with it being a ~2 moa rifle with a very predictable first shot, until I wear out the barrel.