I load 255 swc for my 1911. I use a 1.20 aol and a lfc to .470. This brings the crimp just to the back edge of the first "ring". Thesr bullets are very accurate in my 1911. I just got a 625 and shot it using the same ammo, but noticed some backing out of the last rounds when I checked them. I do know the leading edge of the brass is sort of hanging in mid air.
I guess I will have to set the oal a bit shorter to get the crimp on that front shoulder.