I have that exact die, and in .44 also. You dont have to lube it, but I do after a few sessions. All I do is put a small drop of RCBS case lube on a qtip, and rub it around where the ase mouth will make contact. It's a good way of keeping the die clean and does make it feel smoother. I'm a huge fan of Redding dies, if you ask me it doesn't get any better...my opinion only of course.