I'll play.....
I've been shooting moly since Neco came out with their patented process several decades ago, whether shooting point blank BR, Hunter BR, 600/1000 yard BR, prairie dogs, and any/everything else. There is no down side, it does not build up on itself or in the barrel, & you cannot see it in the barrel. The best and biggest benefit is being able to shoot longer w/o cleaning, and not losing any accuracy, which,surprise, is actually the purpose of Benchrest.
The patented process was impact plating the moly into the bullet's jacket with hardened S/S balls. I believe the naysayers of moly were the ones that were buying the cheaper alternatives to the Neco process, such as Ms Moly & the like, which were actually moly coating the bullets, not impact plating.
I have not used a brass brush for cleaning since I started shooting moly plated bullets many moons ago.
Bore Tech Eliminator, a nylon brush, JB, & Kroil, & I can clean a barrel in 10 minutes.
1st clean/cold round will generally print a hair low, then business as usual til I decide to clean again.
Moly will forever get a bad rap due to ignorance & mis-information.