The 12.7×81mmSR cartridge was created by Vickers as an export variant of the cartridge developed for the Vickers .50 machine gun. The major changes were to modify the case from rimless to Semi-Rimmed and reduce the bullet weight from to .
The 12.7×81mmSR cartridge was created by Vickers as an export variant of the cartridge developed for the Vickers .50 machine gun. The major changes were to modify the case from rimless to Semi-Rimmed and reduce the bullet weight from to .
== History ==
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).