I've been shooting short range (100-200-300yds) benchrest for over 40 years, competing in scores of tournaments, knowing and shooting with hundreds of fellow BR shooters, but never saw or heard of anyone annealing their brass. That is until at the SuperShoot (A major BR tournament.) match last month when a well known shooter was using a AMP unit. He used it a couple days and couldn't see any improvement in his scores and decided not to use it any more because it wasn't worth the bother. His aggs remained the same. If annealing his brass had resulted in improved scores there would have been a rush to buy more of the annealing units, as BR shooters will pay any price to improve their scores, but so far it's a non-issue with the ultra-accuracy crowd.