For rifle loads I weight charge. I use 3 CM lites simultaneously. But what I did discover was even if they include with the same kind of pan, each weighed different. Meaning the pan it self. So I marked the pans for each charge master. Also, putting back the pan cover before each charge makes a lot of difference. It will pickup even the slightest wind draft, A/C, even your breathing, that will throw the weight off if the cover is not on. So cover is a must. Other then that, I cross check with a Dillon each charge before going auto and it’s been dead on. I do check again after 25 charges. The throw on my 550 is ok too. But, I only reload for pistol on it now. So when I’m at weight, confirming atleast 3 throws to verify, I just reload away.