Diagrams showing interior and exterior of British <a href="https://en.wikipedia.org/wiki/.303_British" class="extiw" title="en:.303 British">.303 Mk VI cartridge</a>.
War Office, UK
<p>Plate CX in "Treatise on Ammunition" 10th Edition 1915.
</p>
<br>Facsimile reprint by Imperial War Museum and Naval &amp; Military Press 2003.