You will not see any measurable difference off the bench unless you are flinching now and the muzzle break helps you stop flinching. There is no significant recoil until the bullet leaves the barrel, it's flight path already determined but for the atmospheric conditions.
For a faster follow up shot, you will get much better effect and many fewer evil looks from anybody who has to be next to you or behind you when you are shooting if you use a sling.
Also consider a forward pistol grip and adopt the trigger-hand elbow down: those two things together make for adequate accuracy and much faster follow up shots compared to the high-elbow form we are all familiar with.
http://thetension.blogspot.com/2007/02/combat-camera-all-in-days-work.html