I have had a S&W Model 59 since 1978 and have fired over 30,000 rounds through it with zero problems with the weapon itself... it takes any ammo I put through it; hot ammo by the 100 including the Cor-Bon 115 grain +P JHP and Federal 147 grain Hydra-Shok JHP, 124 grain FMJ ball military surplus by the 1000, you name it; the 59 eats it. Do not believe anything you hear about the 147 Hydra-Shok being a junk round either. The only problems I have ever had are with old ammo for target practice failing to fire and this was a problem with the ammo and not the weapon. And these failures you could count on one hand over the last 3 decades...
This piece has never seen a gunsmith or had a part replaced, I only use quality magazines...
This is my primary CCW, although I have an affinity for my .45 ACP S&W 1911's, love the feel of having a handful like you do with double stacks...
Pachmayr Grips are my only custom accessory, love em...
Sempher Fi