My Hornady dies are working very well for 9.3x57. I've got both Husqvarna rifles shooting with decent results. The most recent loads were made up with IMR4064. My dies were a gift. I have no idea about the vendor.
41 Magnum: I had started out with Shooter's World Powders. The first rounds was with Ultimate Pistol. This powder did work well. The burning rate information and data takes me out of my comfort zone. There is no Lovex date on this powder. The last small run was done with SW Heavy Pistol-similar to Accurate #9. There is data from SW or Lovex for 41 Magnum. I'm having to ration large pistol primers.
I would have lost money on a bet about the RCBS lube. The nickle plated brass is a different critter.