Gents - I start by asking is this the correct place for this topic? It's not a military caliber, however I just obtained an AR upper in this caliber and am looking for a bit of guidance, if anyone would care to share some knowledge. The caliber is new to me and was going to just use this as a "fun gun" for the range, not a true target or hunting rifle. My original intent, was to pick up 200-300 rds of factory fmj ammo and swap uppers every now and then for a change of pace. Good intentions, aside - probably worst time to start with a new caliber, let alone a "semi auto rifle caliber". I already load for the Creedmoor caliber with a good assortment of jacket bullets on hand and just acquired a set of dies for the Grendel. The hunt is on for new/ used brass and/or brass cased ammo. I've already about the differences in primer size in some brand of cases, but anything else to be aware of for this caliber. I'm quite familiar with the 15/10 series rifles, have loaded and shot alot of ammo thru both platforms, just wondering if there's anything unique to this caliber to be aware of. Appreciate your time/ knowledge - Bill in MA