Made an attempt to load about 30 rounds yesterday, with goal of making the entire run all the same. As identical as I could get them.....at least with equipment I have. Normal case sizing, primer install, etc, and trickled up powder to get all within 0.1 grain. Lee Powder measure was right half the time, but would throw charges as much as 0.2 grains light now and then. Amazingly, that being a big stick powder (IMR 4530) it only took a couple grains from the trickler to balance. May be more accurate than it seemed.
But that was not where the problem was. When seating bullets, I would bottom press out firmly, and sometimes a 2nd time, but when case length was measured, they varied by as much as 8 thousands, but most were 2 to 3 thousands more than what the dies were set for. Eventually had to resort to running them all thru again..... twice more, with a 90 degree turn the 2nd time. That finally got them all within 1 thousands of same length. And did that without touching the seating die.
Still using a Lee Breech loader press, which will bottom out, but does not cam over. Dies for that run were some of Pacific. Nothing special.
To get to a constantly reliable seating depth, does that take a press that cams over? Or do those require constant attention too?
But that was not where the problem was. When seating bullets, I would bottom press out firmly, and sometimes a 2nd time, but when case length was measured, they varied by as much as 8 thousands, but most were 2 to 3 thousands more than what the dies were set for. Eventually had to resort to running them all thru again..... twice more, with a 90 degree turn the 2nd time. That finally got them all within 1 thousands of same length. And did that without touching the seating die.
Still using a Lee Breech loader press, which will bottom out, but does not cam over. Dies for that run were some of Pacific. Nothing special.
To get to a constantly reliable seating depth, does that take a press that cams over? Or do those require constant attention too?