Glocktogo, I am still not convinced. Ruger has been casting 1911 frames and slides for Kimber, S&W, Caspian and many others and no one has mentioned the "thicker and heavier".
I was speaking of Ruger's P series pistols and their DA revolvers. As for their 1911 frames, I'm sure they're fine (and if anyone knows proper casting, it's Ruger). It's just that between the two, I prefer forged and I'll bet others do too.