I use the RCBS ram primer on top of my single stage press to seat primers, and then I measure the depth of most of them. I知 a bit surprised with the amount of variation I see in primer depth, even though I am using calipers and not a depth mic. Measurements can range from flush to 0.006賠 which is triple the range in overall case length I get.
*
I think the root cause is variation in the case flange thickness. I知 using an RCBS case holder. Is there a tight & precise fit case holder to hold this better, or some other means? I might sort out the brass with thin flanges.
*
I understand this may not be a meaningful issue, but reloading is where I get to let my OCD run wild