Hornady OAL gauges?

[Axis II]

Okay guys I have another question. I used my OAL gauge and came up with 1.841 consistently for my OAL measured to the Ogive with a bullet comparator and OAL of 2.233-base to tip. I usually seat to 2.230 by coloring the bullet and seating to what chambered and never had an issue. Everything I have read says 0.020 off the lands which would bring me to 1.821 per the bullet comparator which seats the bullet very deep in the case. I measured about 10 factory v max and came up with an average of 2.230-2.235 for an OAL from base to tip and the comparator showed the same average and close to my 1.841. all the factory ones chambered freely accept 2 rounds I found at 2.250 and 2.245 and it was hard to extract them.

I also watched a youtube video by Hornady reloader using the OAL gauge that says I need to use the headspace from my fire formed cases instead of the modified case. Modified case measures 1.452 with the headspace comparator and my fire formed measures 1.455. My OAL would be 1.843 according to the bullet comparator using my LC fire formed cases.

Am I over thinking this too much? at 20k of the lands the case mouth is probably 10k from the bullet being seated past the strait part of the bullet.

I'm just trying to be safe and keep the accuracy bug at bay.

 

[Bart B.]

Bullet heels can be seated past the shoulder point on necks. Happens a,lot when heavy bullets are used in small caliber cases.

300 Win Mags have a short neck and 200 to 250 grain bullets often seat that way.

Where and who was the first to set that standard, I don't know. It's one of many myths. And it is a close relative to the myth that bullets must be seated one caliber deep in case necks.

Another myth is any "must" dimension for bullet jump to the lands. Whatever it starts with will increase .001" for every 5 to 50 shots depending on how much overbore the cartridge is. Lands erode down barrels that much.