I too have a large variety of dies from all different manufacturers, and I cannot say I have any brand preference. I have only two sets of Lyman dies (one in .308, one in .44 Mag), no complaints about either. Numerically I have more RCBS die sets, followed by Lee. My point is that I really don't care who made the dies. When I first started reloading I had a Lyman Tru-Line Jr. press which used much smaller dies. I still have that press and Lyman TLJ dies in several calibers, but I have not used them for many years.