Making a Lead Sinker Mold???

I have zero experience with casting metal but that hasn't deterred me from attempting to make a lead sinker mold. And I must say it's not going well. The finished sinker/weight shape is 1/8" half round about 9/16" to 5/8" long. The grooves in the mold are about 6-1/2" long, width is 1/8" and

DIY Fishing Sinkers - Save Money on Sinkers – Tetra Hook

Lead Molds and Sinkers - Nets & More

Fishing Sinker Mold AluminiumFishingMold Lure making Lead Molds

How to Make Fishing Sinkers The Hook and The Cook

Fishing Sinker Mold Aluminium Fishing Mold Lure making Lead Molds

Lead, 7 sinker molds, burners to melt lead and pots - complete

Angling Sinker Moulds

Diy Fishing Ball Sinker Mould Adygil Sinker Fishing Mould

Cast You Own Spider Sinkers : 5 Steps - Instructables

Making a Lead Sinker Mold???