If the .22 shot inside the 6 at long range they would be using them in LR Comps.
Since this conversation keeps drifting to cartridge selection, I guess I'll bite.
My experience in competitive shooting leads me to believe the opposite. Top level competitors use what they've always used and it takes an act of God to get them to make major changes. To their credit, there's a good reason for this. What they have works really well, and their are more points to be gained by spending time at the range than by spending time at the loading bench. If Tubb hadn't been so successful with the 6mm, I seriously doubt many people would be shooting them today. I'm not saying that a 22-250AI or 22 Creed would make a great F Class or BR rifle. There's more that goes into that decision than just the external ballistics, and the mfg advertised BC is RARELY correct in application. Then there's the fact that what works best for something like BR or F class where the distance is known, doesn't necessarily work well for varmints where the distances are both unknown, and inconsistent.
As I've mentioned before, I plan on having multiple barrels for this action before its all said and done. In fact, I'll probably buy 2 right off the bat. One of those barrels will be in something like a 22-250AI or 22 creed. If for no other reason, I have several hundred 75gr projectiles that have been sitting on my shelf for over a decade, and they need to find themselves some fur to poke holes in. Will I find that such a cartridge heats my barrel up to fast? Yeah, most likely. That means the 2nd barrel will probably be something like a 22BR or 223AI, and I'm leaning towards the 223AI because I already get a 75gr up to 2950 with the standard .223, the .223AI is cheap to load for, and I can still cram the ammo into AR mags and drop them in my backpack if I want to go on a walkabout. A PPC or BR cartridge would gain me another 50-100 fps, but the real world advantage of that extra speed is negligible at best. If I were interested in a PPC or BR based case, I'd likely wait and go with a 22 ARC or 224 Valkyrie once better brass becomes available. While I absolutely love the idea of something like a 6x47, for my applications, ALL 6mm options gain me more recoil (hard to spot for myself), burn more powder, and shoot more expensive projectiles while gaining me little to no practical benefit in application. Would a 105gr 6mm ACTUALLY drift less at 1000yds? Probably. Would the difference be enough for even a very experienced shooter to know whether it was the bullet or a slight shift in the wind half way to the target? Probably not, at least not unless I'm pushing it from a case big enough to heat my barrel up almost as fast as a 22 creedmoor. The point is that its a compromise. If you want less wind drift at distance, you're going to be pushing heavier bullets with more powder, its going to heat the barrel faster, and it's going to shorten the barrels life. The reality is that even in September, the majority of my shots will be in the 200 to 400 yd range, and at 400 yds a 75gr ELD at 3050fps from a 223 AI is hitting within about 1-1/2" of a 105gr 6mm that was launched at 3100 fps. When the distance extends to 600 yds, the 6mm does about 3.5" better in the wind, but doesn't have nearly as much drop. The problem for me is that if I'm shooting past 400 yds, then I'm just trying to see how far away I can hit something and in that case, I might as well be shooting a screamer.