Brakes are not allowed in metallic silhouette rimfire or center fire competition and a section on prohibited ammunition that will damage the targets, so there is that as well.In my experience, fierce muzzle blast is more of a flinch maker than recoil. A braked AR with that old hot Norc ammo comes to mind, or my lone 243. The more overbore the more ignorant in that regard, to me.
ETA: this would be for inexperienced shooters. I have no doubt that silhouette champs have a different experience...
I do know that when shooting at 200 and 300 meters offhand these days I can shoot my .223 match rifle better than I can my .308 and it's not because of noise or muzzle blast but purely because of the recoil.
Both rifles weigh very close to the same , with 30" barrels.
Cat