I've had a few Mossberg pumps and presently have a 590...and never a problem. How "forcefully" are you racking the slide? While shooting you'll just need to eject the spent shell and chamber a new one. No need to slam it back and forth on an empty chamber.
Why not shoot it and see what force this take to accomplish before "racking the snot out of it"? Think you'll be surprised what little effort it takes.
Quando omni flunkus moritati