I have a old Dillon RL 450 press from a old dear friend of mine that pass away. My question is how do you adjust the powder charge. I used it about 20 years went he had it. I would like to buy a star that helps to turn the shells I notice ebay sells them and do they work good. I also understand a lot of 550 parts will interchange with the 450. This one is set-up with 38 dies in time i would like to get the shell plate for 45 acp and 9mm does 550 shell holder work with the 450