ammo nameing.
well thats a long story
lets start with black powder ammo 30-30, 45-70, 44-40 30-40 etc.... First number is for the caliber, second is how many grains of black powder
next lets look at the 30-06 which was an improvement over the 30-03. 30 is the caliber while the 06 and 03 were the year it was accepted by the US military. from the same family we get 25-06 and 338-06 which were wildcats that have made it to factory production.
now were getting into more north american rounds, .308 .270 .280 normaly the number is followed by the name of the company that started offering the loading, ie ruger winchester savage federal etc...
confused yet...
metric ammo, first, 7.62x54R 7.62x51 7.63x38 8x56 7x57 6.5x55 ect.... easy caliber and lenght, and a quick note the calibers are nominal so 7.62 can be .308" to .313" depending on what your shooting.
then you get stuff like 7mm mauser, 8mm mauser, 6.5 swiss which are for the most part just other names for the same cartridge listed above.
wildcats are all sorts of other names 250-3000 was a 25 caliber (.257") that was designed to fire a projectile at 3000 feet/sec
more
577-450 that was taking an older British army 577 cartridge and necking it down 450 caliber.
so its all simple.... really.
