COAL vs OAL

S

Steve7mm08

Well-Known Member
Joined
Oct 21, 2006
Messages
252
Location
Top of the South Island, New Zealand
This is most likely a stupid question, but nevertheless one that has been bugging me.

What is the difference between COAL and OAL??

If I use a stoney point comparator on my calipers does that give COAL or OAL?

Someone put me right please

Cheers, Steve
 
woods

woods

Well-Known Member
Joined
Jun 4, 2006
Messages
995
Location
Shangri-La
I consider COAL and OAL the same thing and is defined on the SAAMI Glossary

SAAMI | Product Manuals

in the 2nd definition

"LENGTH, OVERALL
1. Firearm: The dimension measured parallel to the axis of the bore from the muzzle to a line at right angles to the axis and tangent to the rearmost point of the butt-plate or grip.
2. Ammunition: The greatest dimension of a loaded cartridge, i.e., from face of the head to the tip of the bullet for centerfire or rimfire or to the crimp for shotshells or blanks (not to be confused with the uncrimped length in a shotshell.) "

You are not measuring the COAL or the OAL with the comparator. You are measuring to the point on the ogive that is close to caliber dimension. That is shorter than COAL but much more useful.
 
F

Forester

Well-Known Member
Joined
Mar 23, 2008
Messages
436
Location
Chatham, VA
On a related note, is there a standard term for the measurement to the ogive? In my notes I just use OGL... I don't even record the actual OAL
 

Similar threads

S
Replies
1
Views
1K
BigSkyGP
B
Bobcape
Replies
1
Views
2K
BountyHunter
B
D
Replies
2
Views
973
Mikecr
Mikecr
S
Replies
22
Views
5K
Boss Hoss
Boss Hoss
Tadd
Replies
5
Views
4K
boomtube
B

Recent Posts

Top