Really depends on your setup, and how limp your barrel is.....mainly i'd say it should help with a very quick follow-up shot with a semi-auto. I have one on my 10/22, and it really helps when dumping the mag, when the gun is on a bipod...keeps everything going into the same hole on the paper. With the .22, recoil is not an issue, but barrel resonance is....
For a bolt action centerfire, i don't think it would be much help; but i've never tried it.