Prime Ammunition is loaded by RUAG, and uses Norma Brass and the Norma 130gr bullet."
That's from the Snipers Hide 260 ammo review and I've seen the same posted about the 6.5 brass as well.
Everything on the 6.5 points to it being as accurate or more accurate than the Hornady 140 ELD-M and 143 ELD-X, but each rifle is different. Prime 6.5 seems to get a little lower SD & ES than Hornady ammo. I highly doubt you'll see it on shelves, and believe it's only sold online (at the moment). Maybe local to where they are at it is sold in some gun shops, I don't know.
Better than reloading your own? I doubt it...once you find a primer, powder and bullet combo that your gun loves, it's hard to beat it. That 142 SMK load that put 4 shots into a sub-0.25 MOA hole that I posted some pics of on here will likely be more accurate than the 130 Prime, and my SD/ES were 4 & 8 respectively. Granted guys are getting high single digit SDs sometimes out of Prime 6.5.
It's appeal is that in most 6.5 guns it seems to shoot 0.75 MOA or better (mostly half MOA or better). That's nice for factory ammo that's possibly cheaper than the Hornady stuff. But ultimately a good reloader can likely make a rifle shoot better with hand loads.
I hand load but I'll be buying a case of 130 Prime 6.5 when it comes available again
Hope that helps you out