length???
If you are loading SAMMI specs or are you reloading off L&G.
It is not overall length, I did not change setting on the die, second batch in the lands, I was .015 out. noticed this when I had a round not want to chamber. I went home and checked and had to adjust. I always make sure brass is the proper length.
I think that is what I need to do, my terminology may be misleading and my methods may be primitive but I usually have good results.Within the same bullet type and weight, but different lot #s, I will usually need to adjust my seating die to achieve the same CBTO measurement. It can be as little as .001" adjustment or as much as .005" between different lot #s. I'm using the Hornady LnL Headspace Comparator tool.
I try to buy several boxes of the same lot # when I buy my bullets.
yes I do, it is possible die could have moved, I will check closer in the futureYou might not have changed setting on your die but "IF" you have your setting depth (CBTO) written down for your load, you should always check the CBTO before proceeding on your next run. Perhaps the lock nut has moved on you or you did not set the die all the way. I always do a dummy run and check my CBTO on all of them for consistency.
I use a comparator for my bullets because they are all different in the same box ! I find some 005 different and I separate by size !I have found that I, in most cases have to change my seating depth when using a new box of bullets, same part number, just different batch #. I have had this happen with Berger and Sierra both. Is this common?