The main problem I had with the Lee Dies was with the Decapper and Sizer Die. I think I broke three Decapper pins in a matter of a few weeks because of Mil primer crimps and just being to weak. I had the carbon dies that are supposed to take little or no lube. It also takes three dies with the Lee setup and only two with RCBS so you get them done quicker with RCBS on a single stage press. I have only been reloading for about 6 months so I am no expert, just my opinion. I have had zero problems with the RCBS and after loading over 5000 rounds and I am still on the original decapper pin. (Knock on wood )
Lee "carbide" rifle dies that require little or no lube? I think I might of found your problem.