I've had two different Ruger Scout rifles. One with a flash hider and one with a muzzle brake, both equipped from the factory. The biggest benefit I see from any flash hider, is as a muzzle protector.
The factory supplied muzzle brake...Extremely effective at recoil reduction, but at a price. The muzzle blast and concussion is tremendous. I removed the brake and installed just a thread protector. I am pleased.
http://www.rugerforum.com/phpBB3/viewtopic.php?f=4&t=280721&p=2803806&hilit=thread+protector#p2803806