I posted this elsewhere for our Canadian neighbors, after I stumbled over a link to a Canadian source for Prvi Partisan on sale at prices similar to what they were from Graf's over ten years ago:
$46/per 50 versus the usual $57/per 50 (or something like that) - in Canuck Bux of course.
[URL unfurl="true"]https://www.westernmetal.ca/shooting/303-british-new-prvi-brass-bags-50-prvi303b-50[/URL]
Relevant to all who reload for Lee Enfields, cast bullets or not, a reminder of why using Prvi - or similar quality brass from ball ammo like Greek HXP - is really helpful when feeding Lee Enfields. Along with properly prepping bulk brass prior to first firing in Lee Enfields, and all resizing after that. Compiled and conglomerated from forums elsewhere so I don't have to rewrite what has already been pointed out.
Prvi Partizan cases are .010 thicker and heavier in the base web area than ANY other brand of .303 case.
Fired Prvi and HXP cases below. Prvi Partizan on the left, Greek HXP on the right both once fired cases in the same Enfield. Prvi Partizan brass is made like the more robustly made American military cases are.
The Prvi cases will change your outlook on headspace compared to flimsy American made cases.