I typically use recipes straight out of the book and don't tweak the cartridge length. From what I've read it's getting into the last few tweaks of a precise load and won't make a big overall difference.
Even so, I have a bullet comparator, and a seating tool to see the distance of the bullet to the lands. With this I can figure out the max length before I get zero jump (or jam if I go negative). This is only appropriate to the bearing surface of the bullet, and each bullet will be shaped differently (having a different COAL).
Do people translate ogive length to coal for loading on each bullet, or do you only use ogive distance?
I also hear that as barrels wear, the throat length will increase- do people track that?
Even so, I have a bullet comparator, and a seating tool to see the distance of the bullet to the lands. With this I can figure out the max length before I get zero jump (or jam if I go negative). This is only appropriate to the bearing surface of the bullet, and each bullet will be shaped differently (having a different COAL).
Do people translate ogive length to coal for loading on each bullet, or do you only use ogive distance?
I also hear that as barrels wear, the throat length will increase- do people track that?