After a few years, mine aren't discolored and I use only handgun powder---but I agree with Grumpy----treat the hopper with something to prevent discoloration
I just loaded up a few hundred, 230 gr FMJ, 5.9 gr @1.25; very soft/accurate
It has taken the place of my normal Clay's load until the australia plant gets going and we see it on our shores
I've got well over 10,000 rounds on my two reloaders and they are still going strong. Neither has given me any issues regardless of caliber being loaded.
Glad you are happy as well.
It just made more sense to me to have a toolhead, powder dispenser, dies, etc. for each caliber; for me, it's just simple to swap out the entire toolhead and move on. Some might think different but it works for me!