The little feller is 60 lbs right now. It would be a couple of years before he is legal for deer, but I would like to
have him shooting at the range a bunch in the meantime.
I have a couple of 7mm mausers he could use when he is up to the recoil.
As far as legal in California-----
CA DFG says " may only be taken by rifles using centerfire cartridges
with softnose or expanding projectiles"
If I may make a suggestion, based on real life experience, go with the .223.
I was born in California, lived there for most of my life, and hunted deer there every season since 1976. Most of the deer that I've killed in the Golden State were one-shot drops from a .223.
I started using the .223 about 20 years ago or so, first in a Mini-14. I elected to use it because it was legal to do so, the deer that I would hunt while using it would be small and shot at fairly close range, and my Mini-14 was stainless steel, and I felt it would handle 7 to 14 days of constant exposure to Ventana Wilderness salt air and fog better than my old Springfield would.
Winchester had just come out with their 64 grain Power Point load then. I used it successfully with "bang, flop" results, most of the time, and if the deer did trot a ways after taking the hit, they didn't trot far. When they did trot off, I am certain they'd have done so when hit in the same place with my old Springfield, too.
I was very impressed with the round. It is inherintly accurate. It is very pleasant to shoot. It is easy to shoot well. It is cheap to reload for so you can shoot one often without going broke. And it has enough power to kill deer and kill them dead.
I ditched the Mini-14 but kept using the .223 in a T/C Contender Carbine on coastal blacktail hunts with total and complete satisfaction.
And I still use the .223 as a deer rifle. If the round didn't work for me, I'd have ditched it a long time ago.
Nowadays, I shoot a Handi-Rifle in .223. When hunting deer or similar sized critters with it, I now prefer to shoot the 62 grain Barnes TSX bullet. The amount of penetration that little pill gets is incredible. It digs in deep, expands like it is supposed to, pretty much liquifies the lungs on a boiler room shot, and punches its way out to make an exit hole.
I now have a .30-'06 barrel for my Handi. I'm still going to use the .223 for my smallish local whitetails next season, because it works well on them, too, just as it did on California blacktails.
-JP