I have used a Lee 44 Mag die set to reload 445 Super mag. I just happened to have a set of these dies and they worked for me. I will suggest that you apply a little case lube to the brass even though the die is carbide. I found this out the hard way using a Lee carbide sizer for 41 Mag to resize my 414 Super mag cases. After about 15 to 20 cases, I ran one up into the die and it didn't want to come back out. Ended up pulling the carbide ring out of the die trying to remove the case. I seem to recall a mention of using lube on the longer cases way back in my mind, but of course didn't recall it till after I ruined my die. Good luck with the 445, it is pretty potent.