.300 Blackout COAL?

[Jay Andrew]

SAAMI COAL is established by the manufacturers who submit the round. It is measured from the tip of the round to the base. This measurement is especially important for proper function in a magazine/action.

Then you set the bullet out as long as you can before it touches the lands. You are setting the cartridge length based on when the bullet ogive touches the throat of the chamber. This dimension is going to vary widely based on the wear of your chamber and the geometry of the ogive.

This base to ogive measurement is an important one it you’re tinkering with loads for accuracy. Or you would like like to measure consistency of The COAL.

In short they are different measurements used for different purposes.




Reloading...it’s like knitting for men.

[Virtualjim]

SAAMI COAL is established by the manufacturers who submit the round. It is measured from the tip of the round to the base. This measurement is especially important for proper function in a magazine/action.

Then you set the bullet out as long as you can before it touches the lands. You are setting the cartridge length based on when the bullet ogive touches the throat of the chamber. This dimension is going to vary widely based on the wear of your chamber and the geometry of the ogive.

This base to ogive measurement is an important one it you’re tinkering with loads for accuracy. Or you would like like to measure consistency of The COAL.

In short they are different measurements used for different purposes.




Reloading...it’s like knitting for men.

Thanks for the reply.
It's a 125 gr Nosler I'm loading.
https://load-data.nosler.com/nosler-...-AAC-125gr.pdf

Which lists 2.260 as max length for that bullet.

With my measurement (and allowing for a healthy .010 thousandths of jump) that would put me loading at 2.30 which is a whopping 40 thousandths over the company's stated max.
Factory loads measured in the 2.210 have functioned without flaw.

New enough at this that I'm wanting to make sure I don't blow something up.