I bought a Dillon 550 back in the days when I was shooting IPSC three gun competition (right after the 550 hit the market). I load about a dozen calibers including .375 H&H Magnum.
These days I mostly load pistol (.32, .38/.357, .44 Special/Magnum, .45 ACP/Auto Rim, and 45 Colt and soon to be .454 Casull).
I have three Dillon powder measures and two 550's. My original powder measure finally needed some upgrading. I called Dillon and the tech stated that he would not be able to send me what I needed as they had upgraded the measure so many times that he couldn't be sure he would be able to send me the parts I needed. He suggested I send the whole measure to them. I did and in less than two weeks I opened up a box from Dillon and had a complete new measure NO CHARGE.
As has been my experience ever since I got connected to Dillon with my first press the NO BS WARRANTY is exactly how things work.
DILLON FOREVER!!
Dale53