As suggested, I'll also try allowing more elbow flex. The gun is real purdy with the stock rosewood grip, it'd be nice to keep it.
I also just picked up a Hogue grip. I can see it fills the hand better than the stock grips and the rubber and texture is sure to slow that roll enough to handle hotter loads without jamming into the hammer.
If any of you know people at Ruger, one cheap easy design improvement to the SBH would be to round out the frame up around the hammer so that when the hand bottoms out in stiff roll the the landing zone is more like the hump on the Redhawk backstrap which brings the roll to a comfortable halt. Right now everything up around the hammer is sharp angles.