Quote: My research indicates lead projectiles only for target shooting.
It seems that with the 'phasing in' now complete, shooting of _any_ critter with lead is banned in California.
From California Department of Wildlife:
Nonlead Ammunition in California Effective July 1, 2019, nonlead ammunition is required when taking any wildlife with a firearm anywhere in California.
In October 2013, Assembly Bill 711 was signed into law requiring the use of nonlead ammunition when taking any wildlife with a firearm in California. This law required the California Fish and Game Commission to adopt regulations that phased-in the statute’s requirements by July 1, 2019.
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.
What about target shooting or firearms for personal protection? The regulations do not require use of nonlead ammunition when target shooting. Use of lead projectiles for target shooting is legal unless CDFW or another government entity has determined otherwise for lands they administer. The regulations do not prohibit the possession of concealable firearms containing lead ammunition, provided the firearm is possessed for personal protection and is not used to take or assist in the take of wildlife. With the exception of ammunition for concealable firearms possessed for personal protection, hunters may not possess lead ammunition along with a firearm capable of firing that ammunition.