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

577/450 Martini Henry unstruck inert round (S2/A)

Forming 577/450 Martini-Henry Brass

Obsolete, The three bottleneck rounds are .577/450 Martini-…

AMMO: 2 X ANTIQUE ROUNDS 577/450 MARTINI-HENRY, 577 SNIDER - BOTH COILED BRASS CASE - Kidd Family Auctions

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

Reloading brass shotgun shells. : r/oddlysatisfying

Brass Bertram 577/450 Martini–Henry

517 best r/shittyreloading images on Pholder

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

Sizing 577/450 Martini-Henry. 9 out of 10 came out right. : r/reloading

Unprimed, New .577 Snider Black Powder, Centerfire Rifle Cartridge Brass – Everything Old Antiques & Vintage