7828 is going to trump 4831 and especially 4350 for velocity at near same pressures! I use it in 300 Mag with 180's, and 6mm Rem Improved with 100 to 108 grainers, It trumps H4831 for top speed in both, and shoot as accurate with some bullets. Like any powder bullet combo, you use what works best, and none of these powders will be the best option for every bullet.
Saying that, I would do as others have said, no matter which powder you use, work up your loads above 50* mark if shooting above 100 degree temps at times and don't look back. If your loading that hot to be on the ragged edge at 50* your already defeating one purpose of reloading for yourself! All can be excellent, and none are dangerous when loaded like others have stated!