Upvote:3
What kind of rifle used this shell case?
I'm no expert but from what I've read ...
The marking "6PR" suggests a 6-pounder, for example the QF 6-pounder Hotchkiss
Image is Public Domain - Crown copyright expired
The arrow mean accepted into service
"N" means Naval service
"IV" means a Mark 4 casing
"CF" means cordite filled
"1917" is the year of manufacture"
what mean this symbol on the bottom?
As sempaiscuba commented: "The symbol is the original manufacturer of the shell case." Often initials were used but sometimes the "original contractor" used a trademark of some sort.
Here's an example from a different calibre:
From "Treatise on Ammunition, 10th Edition, War Office, 1915"