From everything I'm seeing I'm thinking it's an amazing little cartridge. The 6 ARC and .224 Valkyrie honestly seem like two of the new cartridges that just plain punch above their weight. Cheap and versatile to reload as well. The .22 Creedmore is another interesting one
Curious though , 6 ARC is basically just a sammi spec 6 grendel right ?
Was actually listening to a precision shooting podcast ( Erik Cortina and someone else can't remember who) and they talked about how funny how bench rest guys madw the 6ppc then 6BR theb the guys tried buming up to 6.5mm for the military but now there going back down to 6mm because it just works for that size case
Yes the 6 arc can be resized from grendel brass, you just resize, and trim .024". the reason for the increase in interest in smaller capacity cartridges is the availability of good high BC bullets and faster twist rifling.