Hello newbies from Lincoln

[ovenpaa]

Cartridge and bullet sizes are either in Metric or Imperial designations for the most. So if something starts with a number such as 7.62 it is a metric size, if it starts with a dot such as .308 it is an imperial size. Metric will include the case length where as imperial will not so a 7.62x51 has a nominal case length of 51,0mm's. Some are very similar despite different names. The 7.62x51 is nearly the same as the .308 dimensionally.

It is a subject that is worthy of a book and many have been published on the subject.

Look out for letters after numbers:

7.62x54R - the R stands for Rimmed
8x58RD - the R stands for Rimmed and the D for Danish

Now to confuse things some will have a second number and not be for case length. The 30-04 is a 30 calibre bullet in a case designed in 1903 and the 30-06 was designed in 1906. Also some have three sets of numbers, so a 6.5x47 is a 6.6mm bullet in a case that is 47,0mm long and a 22-6.5x47 is a .224" bullet in a case 47,0mm long designed for a 6.5 bullet.

:cheers:

[Christel]

It is all very

:lol:

[Pete_N_Jane]

Thanks for all the advice, and welcome's sign92 :cheers:

Pete N Jane she's still waving. . . . .

[meles meles]

Cartridge and bullet sizes are either in Metric or Imperial designations for the most...

There are a lot of bores too...