From the CA fish and Foul website:
"How will wildlife officers check for compliance?
All ammunition in a hunter’s possession may be inspected by wildlife officers. In some cases, if a wildlife officer suspects a hunter is in possession of lead ammunition and cannot prove otherwise in the field, he or she may seize a cartridge or bullet for further analysis. Hunters are encouraged to assist in confirming compliance by retaining and carrying in the field ammunition boxes or other packaging."
Funny how they say "Hunters are encouraged to assist in confirming compliance by retaining and carrying in the field ammunition boxes or other packaging"
Well, under the 5th A, I'll let them "seize" a projectile and I get a receipt and tell them I will bill them for it. But in no other way will I assist them in their investigation, Not my job. No box, no invoice, nothing. It is their burden to prove me in violation. I know what I shoot is legal. Not my problem that they can't identify in the field. All they get is my license info and the projectile since the game laws walk all over the 4th A. with a "seizure" of the projectile without due process.
As for the "approved list" show me any specifical muzzleloader-approved ammo.
https://wildlife.ca.gov/Hunting/Nonlead-Ammunition/Certified
See "RotoMetals" where if you buy their Bismuth or Pewter and cast your own, and carry a "receipt" you are good.
But there are many who do not cast their boolets or ball. I do, I cast for my 50. But how many shooters in Kalifornia are going to go through the expense and learning curve to cast? That leaves many here in Kalifornia at a disadvantage.