The first 44 mag I fired was a flat top Ruger 6.5", XR3 grip frame. I Never fired full loads I that gun again. Later I switched it to the XR3RED and it was OK. Still sold the gun (groan, it was #3400 in like new condition) back in the 70's. The OM Ruger that ripped me up was the 41 mag, busted the web of my thumb wide open on the first shot...it went down the road quickly. Best 44 mag full load gun for me is the Redhawk even with the factory grips...I still have it from back in the 80's. I have the square back Super also but do not shoot full loads in it because of the "smack".