The 223.&308 are both good.
An so are the sks,s i have(and the 762.x39)& for what i payed for them are a bargin.
I have hunted yots(once) with them - but i(my son) ussally justplink around with them/ paper targets etc .my mate even likes to shoot the sks,s but she dont like the otherrifles much/ theones with more kick much.
Ijust mounted a red dot sight on the one& may in the future a regular type scope on the other as it seems to shoot "decent to me"-
That caution on slam fires good idea. Good thing to check into& be aware of as a possibility.
The rifleman(chuck conners ) never had that problem

Russki 762.39 20 rounds for about $2.00
30/30,s?I dont know.....Anything you could hunt with a 30/30 could pretty much be hunted with a sks .30 cal also if someone wanted too id think- deer/black bear on down.But there are better choices.
I have other firearms i use mostly for hunting myself. But id check your local laws on whats legal to use -hunting witha semi auto rifles etc( some stateswouldnt allow it im sure.....