Pretty sure dull.... I prefer dull. There's nothing glossy living in the lake... They look glossy when you take them out of the water and "wet"... But if you ever look into an aquarium the fish are not glossy.
I like what I like. I had 700+ custom run baits made by a known company last spring. I'm already down to 100 and wanting 5 gallons made soon. I give away most of them to people I fish with, newbies, kids, and some that buy lures from me.
I have ordered from here many times.. Shipping has been slower than usual.. Just order 2-3 weeks before you need them. Their skirt tabs are nice too.... $10 per 100. Flat rate shipping of $4
I would use this mold and put a larger wire in it than what you will build with. Pour and pull wire out.... Plenty of weight choices.
Do-It Trolling Sinker Molds - Barlow's Tackle