I shot 3P and prone NRA/ISSF rifle matches competitively for most of my childhood and young adult life with a variety of very accurate Anschutz match rifles. In general, I had excellent results with SK ammo. I won many matches shooting even the cheap SK Standard Plus, and occasionally SK Rifle Match (I don't believe they had the Long Range variant back then, but I thought that one was intended more for silhouette/PRC type shoots, so maybe its loaded a little hotter?). This was back when they were in the gold boxes, not the newer black ones, so I'm not sure if anything has changed. Same goes for the Wolf black box, which was identical to the SK - my team mate won the iron sight opens with at the Camp Perry one summer with an Anschutz that was practically an antique with the Wolf, much to the delight of their PR reps. I just tended to find more preferable lots with the SK products than Wolf for whatever reason.
In fact, I probably only ever had four random lots of ammo that outperformed the best of the SK in my rifles - a single lot of red box Fiocchi (the 320SM), some old round-nosed Eley Tenex that I was given to use to shoot the Whistler Boy match at Camp Perry that I'd swear was coated in fairy dust, a few lots of Eley Tenex EPS that were cherry picked/matched at the Eley test range to my barreled action, and two bricks of Federal Ultramatch (no longer made) that came from Lones Wigger's private stash as an apology on behalf of Federal when he was sponsored.
I would say buy a few bricks of what you want to try out on a day with easy conditions, see which ones it likes best, and then play with torque values on your action screws to dial it in further. Generally speaking, I think SK and Wolf Target give great bang for the buck. I would not lump CCI or Norma ammo into the "precision" category, CCI Green Tag included (though its much better than the blue standard).
