I currently own one Super Redhawk in 454 and just sold one in 44 mag. The only reason I sold the 44 mag is I have just purchased a Super Blackhawk in 44 mag that had been sent to Magnaport for action work and came out very nice. I had both 44 mags out shooting them and some one at the range figured out I did not need both and was impressed with how the Super Red Hawk shot and offered cash!!
The Lee loader will work just fine for your reloading needs