That's how I got my 629 4inch, someone loaded it up with heavy loads and did not like it.
They sold it and it was my gain.

Shooting reduced loads will help, later work up to the stiffer ones.
It will not take long, just patience.
I used a set of 'X' frame Hogue's grips, they will buffer the web of your hand but are not pretty looking.

Remember to vote today...and buy a box of ammo.