See, this is what this forum is all about. People helping each other.

I, too, noticed a bit of a difference when I shot my first 150 or so rounds through it - it's the slimmest gun I've ever shot, and I was coming off of shooting a Sig P229, a Glock 19 and my wife's 686-6. So, I was used to wider grips and heavier guns. However, no real "pain", as you indicate. More of a feeling of "snappiness" or not quite feeling like I have total control over the recoil.

Now, after 700+ rounds though, it's no problem at all. I bet I got a "handle" on it (pun intended) after my second range session and 300 or so rounds.

I also found that adding some Foxx Grips (similar to Talon grips, which are popular with the Glock crowd, and others) really helped keep it more stable in my hands, especially when shooting in warmer climes, like here in South Carolina.

Good luck. I am sure you'll get it figured out.