metric is for people that have to count on their fingers. you think it is bad for linear measurement. try volume a 301 307 and 302 engine are all 5.0 liters and not one part interchanges
metric is for people that have to count on their fingers. you think it is bad for linear measurement. try volume a 301 307 and 302 engine are all 5.0 liters and not one part interchanges
The nomenclature is rarely exact. You are taking the designations too literally.
They are no different than most US calibers. You have to know the details because the nomenclature or names are not usually exact.
So the 7.62X54R Russian round is basically the same round as the 7.62X53R Finn round.
And the 7.65 Mauser uses the same bullet diameter as the 7.7 Jap and the 7.62 Russian.
So your issue is expecting different rounds to match literally to the nomenclature and they don't.
How about a .35 Whelen and a .358 Win? They use the same bullets. So does a .350 Rem Mag.
Some rounds are named for the hole that is drilled before the barrel is rifled. Some are named for the groove diameter after rifling or after the bullet diameter.
The .357 Mag pistol round uses the same bullets as a .38 Special which are .357. However the .38 Special case does measure .38. The bullet does not.
EDG
I think it actually does go back to the cap & ball days and the industrial revolution.
For example: The 36cal. Navy Colt that had sort of a .357 inch dia. bore.
When cartridges came along, they called them .38s, then the 38. spec. just for sales and advertising purposes.
Then the .357Mag--for the same reason. .357Mag sounds more cool than 'longer and more powerful .38Spec.'
In each case, as the new cartridges came along, they could make the weapons for them with a minimum of retooling.
In school: We learn lessons, and are given tests.
In life: We are given tests, and learn lessons.
OK People. Enough of this idle chit-chat.
This ain't your Grandma's sewing circle.
EVERYONE!
Back to your oars. The Captain wants to waterski.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |