They should but I never noticed a big difference. However I did when I used the 505 Gibbs. During a charge both the slowness caused by the long bolt throw and the additional recoils became very apparent.

Phil Shoemaker
Alaska Master Guide,
Alaska Hunter Ed Instructor
FAA Master pilot
www.grizzlyskinsofalaska.com

Anyone who claims the 30-06 is not effective has either not used one, or else is unwittingly commenting on their marksmanship.