pwillie
Member
What is a 25 caliber in metric terms?:banghead:
I gotta learn to type faster.6.35mm. The conversion is 25.4mm per inch.
Do we dare get into what the second number "might" mean.....45-70, 30-06, 30-30, 38-40, 7.62 X 51 and so on....
Because it's .355 diameter, like the 9mm, and someone didn't want to call it 9mm.Also, why is 380 called 380?
Do we dare get into what the second number "might" mean.....45-70, 30-06, 30-30, 38-40, 7.62 X 51 and so on....
9mmepiphany said:at least the .44 spl/mag being .429" make sense. The .44 spl was originally loaded with a heeled bullet , like a .22lr, and was the same diameter as the case. When the loaded non-heeled bullets for the calibre, they had to be reduced in diameter to fit into the case
So,a 25 06 and a 257 is the same? Is this how Weatherby came up with a 257 Weatherby
IIRC neither .44 Special nor its parent round .44 Russian ever used a heeled bullet. However, their predecessor the .44 S&W American did, and the designation stuck for its descendents, later including the .44 mag.
and it depends whether you measure the bullet, the distance between the rifling grooves, or the distance between the rifling lands.
45-70 - the 70 refers to the original blackpowder charge that it was loaded with...it is the same with the 30-30
45-70 - the 70 refers to the original blackpowder charge that it was loaded with...it is the same with the 30-30