My go to grips on all K, L, N Frame S&W Round Butt guns.
First used them on S&W 329 (26 oz .44 Mag).
Have them on all my M69s. Was out shooting my 2 3/4" M69 today. 23.0gr H110, 265gr SWGC from the bench (more recoil than off hand) -- 44 rounds and wish I had more ammo.
With that said, everyone's hands are different, so they may not work for you. Fore example, I've tried all current K,L,N pachmayr grips and none work for me. And all wood grips hammer the bone at the base of my thumb.
Tried the Diamond Pros and they were a Lot better than the stock grips.
Currently have a set of the X grips on it now.
Much better for range use but they are big,and I am not a fan of the finger grooves.
Will probably put the Diamonds back on for field use.