I've been making Martini 577/450 brass from 24 gauge brass shotgun shells and it's going great! : r/shittyreloading

Forming & Trimming The 577/450 Martini Henry Case from 24 Gauge Shotgun Shells (First Attempt)

Magtech Brass 24 Gauge Large Pistol Primer Unprimed Box of 25 - Graf & Sons

517 best r/shittyreloading images on Pholder

517 best r/shittyreloading images on Pholder

Making martini Henry Brass - Crushed several cases

577/.450 Martini-Henry Rifles - Part 1

Forming 577/450 Martini-Henry Brass

517 best r/shittyreloading images on Pholder

A rare collection of .577 Snider & .577/450 Martini Henry British Service Rifle Issue Original 1800s LIVE Ammunition

Forming a 24 Gauge Shotshell into a 577/450 Martini Henry Case

Reloading brass shotgun shells. : r/oddlysatisfying

517 best r/shittyreloading images on Pholder

Bertram Unprimed Brass Cases 577-450 Martini-Henry (sold individually) – Rebel Gun Works

577-450 Martini-Henry - Reloading Brass - J&M