I wouldn't use the 13.0 grain load in the .500SW. While it works good for bottlenecked rifle cases with cast bullets, I'd be leery of putting it in the .500.
Having said that, there are loads I use that aren't listed in many places but I use them with the full knowledge that I'm treading on untested ground, so I try to be very cautious in those instances. Using a powder as fast as Red Dot, you can get into trouble quickly.