I have been carrying a G20 for many years, prior to even being popular. I have 2 actually, one is on the G20 frame, the other is on the Lonewolf frame. Lonewolf is nice because it has the thinner grip, better texture, high grip cut, beaver tail. Have a KKM barrel in the Lonewolf. I put a cut aftermarket slide on it and had the front and rear serrations cut deeper.
Back when Robar did gun mods, I had them do work on the G20 frame, did grip reduction, beaver tail, grip texture.
I use Underwood ammo - 220 gr hardcast lead or 200 gr XTP.