So who are you using for 6 Dasher chambering?

Yeah, I would vote PVA as well.

Why? Josh @bohem is a encyclopedia of all things precision shooting. And I mean all things, not just gunsmithing. Projectiles, optics, powders - he knows them all and the math/engineering behind it. Hell, he has designed his own line of bullets, Flatlines by Warner Tool. The external ballistic math is not easy and he has mastered it. Using him as a gunsmith gets you access to this encyclopedia, in case you ever need it.

And on the gunsmithing front - he comes from an aerospace engineering background at Boeing and he drives his machines with the precision aerospace requires. In this context, I'm not at all surprised by the consistent results his guns are getting. His Dashers (and really anything of his in 6mm) shoot 1 hole groups at 100 unless the shooter is doing something wrong.

For complete disclosure, I have known Josh in the shooting community for 10 years and I'm a friend of his.