Negative, 308 is a 30 caliber bullet and 30 doesn't fit into 25.
No
0.380 ACP.
12.7x99, also known as .50 BMG (Browning Machine Gun).
Commonly called the 8mm Mauser, the bullet is actually 7.92mm, but that term is not in everyday use.
NO!!
Yes
Need to know rate of twist and what you are going to use it for.
They are different ways of expressing the same thing. A bullet that is 7.65mm is just that- 7.65 millimeters in diameter. Is the US, we frequently use caliber rather than millimeters- that same bullet was be a .32 caliber- or 32/100ths of an inch in diameter.
Have it examined by a good gunsmith. This rifle use a .22 caliber bullet, long rifle.
.355 Also referred to a 9mm cartridge............
4.5 cal (9mm) like most guns