better to ask than do something dumb

[Bassfish1952]

Technically speaking, from what I know (and I'm not a lawyer) a "regular guy" can't make or sell you self-made ammo without a license...
That being said there could be folks who have a set up of 6Arc already, dies and trimmer etc, and might loan you the use of their equipt to be used at their place, of course you're bringing all your components with or something like that.

But a better way in your case might be to contact a company that does this sort of thing.  Copper Creek does this and does "load development packs" - it's all on their website.  Now they currently are all OOS of all the 6Arc stuff, but call and talk to them.  Maybe they can do something if you have some 1x fired cases from your rifle, or maybe they know somebody else who does this.

The hornady data for a bolt action is the place to start for typical 24" barrel data... the 90 gmx is on their pdf of loads and the 90 Cx is probably pretty much like that but with a snazzier heat sensitive tip.

Thanks I'll check out Copper Creek