I've been playing around with Quickload and continue to be impressed. Today I thought I'd show some results that the more "normal" .500 shooter might find useful: Loads that are reasonably pleasant to shoot, yet still much more powerful than a .44 Magnum, using a common and reasonably priced mold, the Lee 440 grain.
The criteria I used was 25,000 PSI or less, and between 65% and 100% loading density of the net case capacity below the base of the bullet. The program spit out all loads that fit those parameters.
Realize that many of these loads are NOT suitable, for some powders can give squibs if loaded to such low pressure levels (H110, 296, and 1680), and others leave lots of unburned powder unless the pressure is considerably higher (the IMR rifle powders).
Further, many of these powders are not well known in North America, and others I have no experience with yet, like Norma and Vihtavouri.
Last of all, LilGun is a special case: I have NEVER had a gun get too hot to hold in such a short time as I have when shooting loads loaded with this powder, and for that reason I no longer use it.
All that said, this chart shows several good candidates: Alliant 2400 & Blue Dot, Accurate 4100 & 5744, and Ramshot Enforcer can give you loads that have double the energy of Trail Boss loads at only 10%-15% more pressure.