most all zinc weights will be marked ZN, Newer Lead Weights are Marked With PB.
Most Weights Were Seeing in my shop are Zinc Now, Can Still Get Lead Though.
There is also really good information in the sticky near the top of the topic page.
I would love to have some zinc ww's. I do a lot of sand casting with zinc, and they are getting as rare here as lead ww's. (Lead ww's banned in 2011)
Since you say "in my shop" does that mean you sell/mount tires? Reason I ask is that I bought new tires for my truck at a farmers CO-OP in Tennessee a couple years back and was surprised that they are still using new lead clip on weights for balancing. I managed to even guilt the cashier into giving me about 20% of a 5 gallon bucket full of used ones. I had thought lead WW's were long gone.
When I manage to get scrap wheel weights, and sorting them out, I've been saving the zn weights, just in case.
I save the Zinc W W 's for casting into lots of things.
I have cast some butt plates for rifles out of it for some muzzleloaders.
I also cast things like Soft Jaws for my vise that work well and not scratch up parts like the iron jaws do.
I just make molds out of plaster of Paris to do the castings.
I save mine until I have a bucket full then sell them at the scrap yard. They don't bring much but with a bucket of steel weights and a bucket of junk brass I got an even $100 last month.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |