How about a shotgun pellet? 7/8/9 would do and a single shell will yeild lots. Done now I know but... Also, I'd have done a neck size on those and seated a bullet proper. I suppose you don't load ammo though, so no dice. They all look great, yes I saw the Bren striker indent. We had an individual here that had an RAF display with a pair of Browning Inglis .303 guns in a mount and the belts and boxes to accompany. He'd done about 1000 rds for it. The links themselves around here are at least $1 CDN each. Very hard to find. .30 cal links not so hard.