What is the best caliber rifle for coyote hunting in California

If you go in the store, they will gladly help you out.

The before mentioned .223 works pretty well

It really depends on one's style of hunting. In the canyons I bring a .223 rifle for long shots, but generally use a 12 gauge for when they sneak in close.

Here's a pretty good article: https://www.grandviewoutdoors.com/predator-hunting/the-best-predator-calibers

Sorry, I don't know about it.