I've been thinking about trying some Lehigh Defense 120gr extreme defense bullets in my 460 Rowland.
There is no load data that I can find on bullets this light for 460 Rowland. I do see Underwood is offering 170gr Lehigh 460 ammo now, so it's getting close.
I'm looking for some of your thoughts, from where to start with powders to possible malfunctions or it's just plain stupid to think about. If I could be approaching 2000fps with a .45 caliber bullet in a 1911, sounds like it could be worth the try.