You need to take the "records" with a grain of salt. The quality of parts that go into rifles is MUCH better these days. The number of "match" barrel manufacturers has grown exponentially in the last decade, as has action and stock makers. Scopes have gotten much much better too, better tracking, glass, parallax, everything...And we all know when a record is broken with a certain cartridge then everyone and their brother must have one because it's "the best"...even tho the parts, shooter and guy that screwed the gun together have much more to do with it then the piece of brass holding the powder and bullet.
Look at factory rifles these days...a decade ago if you had a factory rifle shoot sub-MOA it was a "shooter" and "rare"...now if you get one that doesn't shoot sub-MOA it's junk and needs returned...