Why is it CBTO and not CHTO?

J-B welder

Well-Known Member
Joined
Oct 26, 2020
Messages
117
Location
Selkirk
When you stand a cartridge on the flat part so the pointy part is pointing up, you've placed it on its head, correct? Where the head stamp is, right? So why is the measurement from the flat part to the point where the bullet starts to narrow towards the tip called the Cartridge Base To Ogive (CBTO) instead of the Cartridge Head To Ogive (CHTO)?

Just a newbie with too much time on his hands and a penchant for weird quirks of terminology wondering how the acronym came to be.
 

FEENIX

Well-Known Member
LRH Team Member
Joined
Dec 20, 2008
Messages
16,454
Location
Great Falls, MT
When you stand a cartridge on the flat part so the pointy part is pointing up, you've placed it on its head, correct? Where the head stamp is, right? So why is the measurement from the flat part to the point where the bullet starts to narrow towards the tip called the Cartridge Base To Ogive (CBTO) instead of the Cartridge Head To Ogive (CHTO)?

Just a newbie with too much time on his hands and a penchant for weird quirks of terminology wondering how the acronym came to be.
Because the CBTO measurement is actually from the cartridge base to the ogive and NOT the case head to the ogive.

Cartridge-Case-Parts.jpg
 

J-B welder

Well-Known Member
Joined
Oct 26, 2020
Messages
117
Location
Selkirk
I don't know, man. Those diagrams seem a little contradictory, or at the very least inconsistent in the application of the term "head." But I think I've exercised my inner two year old enough for one night and my questions are probably just going to get more annoying if I continue. Thanks for taking the time to explain it.
 

FEENIX

Well-Known Member
LRH Team Member
Joined
Dec 20, 2008
Messages
16,454
Location
Great Falls, MT
I don't know, man. Those diagrams seem a little contradictory, or at the very least inconsistent in the application of the term "head." But I think I've exercised my inner two year old enough for one night and my questions are probably just going to get more annoying if I continue. Thanks for taking the time to explain it.
It does not really matter what they are called as long as you know where to make measurements to help make the necessary adjustments, and that's the bottom-line. I was actually expecting a two-year-old question like, why is the head not on the neck or something like that. Anyway, I too have better things to do.
 

CBH Australia

Well-Known Member
Joined
Dec 12, 2020
Messages
212
Location
Australia
Yep, let's accept the terminology. I do, bit saying that my wife talks in riddles.
When she has been helping out in the loading room she calls the Projectiles Hats,
They have to have hats on to play.
No hat no play. Sounds like preschool policy.
Anyway when a case stands on its base the Hat goes on top and we seat projectiles them vertically when they have a full belly.
 
Top