All competition that uses some form of gear has to deal with compromise. Shooting is no different.
Big bores offer better LR ballistics but come with more recoil, and barrel heat. Run super heavy rifles with muzzle brakes and the biggest boomers can be pussycats. Most unlimited BR matches require very few shots to be fired so little issue with barrel warping.
We don't talk about barrel wear because it is irrelevant when you want to place in the top three.
F class is a unique combo of disciplines which is gaining in popularity around the world. With that have come new 'mousetraps' to solve this riddle.
The 180gr Berger is a superb bullet. I shoot it in my 7 Mystic which is my version of the 280AI. At 2875fps, it sails out to 1000m with eerie repeatability. Accurate with excellent wind cutting ability. Is it perfect? NOT IN YOUR LIFE. Wind will still push it around.
I use it in a muzzled braked rifle otherwise, WAAYYY more fun then my shoulder wants to handle.
For F class, some monkeying around with recoil control, shooting this combo is workable but it comes with another big cost - barrel heat. If your barrel can't tolerate 25rds in 15mins of magnum amounts of powder, you may as well be shooting a water pistol.
Finding accurate barrels is one thing. Finding accurate barrels that are also super heat stable is something completely different. A 1/4 MOA barrel that becomes a 1MOA barrel after heating up some amount will drive you insane and your scores into the tank. You can't steer what you can't predict.
I feel that the momentum for F class will occur in the smaller cals especially the 6mm. We now have production bullets that are at or over 0.6BC. Will not be long before more come that equal the 6.5's 139/142gr slugs. Little issue getting these long 6mm bullets to 3000fps without excessive amounts of powder. Throat life may still stink but that's competition. Recoil is less.
Unless, every event is shot under horrendous winds, handling recoil and heat becomes far more important in the long run for most shooters. The 6 and 6.5's will prove overall the best place to be for the near future.
Build a fast 7mm by all means but use it for those windy days. Or just learn to dope conditions better
If someone can come up with an accurate 120ish gr 6mm bullet that can tolerate 2800 to 2900fps and have a real world BC of 0.65+, it will dominate LR F class/TR and similar sports.
But then if someone came up with 6.5 bullets with BC approach 0.7 (155ish gr), it might just dominate LR everything too. At this time, I see no new R&D in this cal which is a huge pity. Come on Lapua....
Jerry