"I looked it up and I can get .308 rounds $250 for 500 rnds.
Where? I'd love to pick up some .308 for $0.50/cartridge. But, the last time I saw those prices was two years ago and it was for surplus South African 7.62NATO. Great for banging away at the range, but not accurate enough for serious target practice and of course, no hunting allowed with FMJ military bullets. If you can even find 7.62NATO surplus now, it's over $0.75/cartridge. (I saw a crate of Austrian 7.62x51NATO listed on the EE for $0.85/cartridge today)
The best prices I've seen lately for .308 hunting rounds start at just over a buck per cartridge, and the high end stuff hits $2/round. The few times I've come across 7.62x39 hunting cartridges, the prices were about the same as the cheaper .308(ie. over a buck a round) If anyone knows of lower priced 7.62x39 hunting rounds, pleased send the info my way.
So I'd say if hunting is high on your list of planned activities then you might as well go with the M14 as entry level hunting ammo costs about the same for both sizes. Plus, with an M14 you can go after game bigger than a deer or hunt at greater distances.
But, if you are a new shooter you better put aside some money for practice ammo and spend the time to get good with your gun before trying to hunt beyond ~200yards(or any distance for that matter.)
Since you are worried about the price of ammo, I suspect you might also be worried about the price of a good scope mount and the strong scope required for an M14(M14's are known to destroy weak scopes, so don't go cheap on this stuff). I imagine that you might be tempted to stick with using open sites. If you are a new shooter, I'm betting that you'll have a tough time being accurate enough with the open sites to take advantage of the longer shots that an M14 can be used for. So, if you're only interested in deer, we're back to the 7.62x51/.308 being as useful as the 7.62x39. (ie. Your safe/ethical shot radius will be about the same until your skills develop.)
At this point, I have to stop and ask for your forgiveness if you are an experienced/trained shooter. I'm making a lot of assumptions and I hope I don't offend you.
Anyway, on to some positives regarding 7.62x39...
If you think you might want to spend a lot of time practicing and blowing off rounds, no other center fire comes close to the "bang for your buck" available with the surplus 7.62x39 that's floating around. $160/1120 cartridges is excellent even when compared to pistol ammo, never mind rifle cartridges. You can't even reload .308 for that price. You just have to make sure to clean your gun after using the surplus 7.62x39. By the way, based on your belief that you can get .308 hunting ammo for $0.50/cartridge, I suspect you might not realize there is a diference between full metal jacket military surplus ammo and soft point, expanding hunting ammo. It is illegal to hunt with FMJ ammo. So keep in mind that whenever you see the term "surplus ammo" used, it's only good for practicing.
Anyway, for the price of a new Mini30 I think you could buy an M14 and a SKS(I know you don't want an SKS, but given that you are concerned about ammo costs, at $0.14/shot you might learn to live with it;-)
Also, if you really are worried about the cost of ammo, and you plan on doing a lot of practicing, and you don't want an SKS, and you want to hunt deer, and you want great accuracy/reliability/etc, then you really should think about one of the earlier recommendations: CZ 858-2
You might think I'm a little biased if you were to read some of my other recent posts in that I have been enjoying my 858 a lot lately. But, I also own 3 M14's which I enjoy shooting. So, I'm not spouting off advice based on an attitude of "I think this gun is better because I own it": I've got both. I'm just trying to give you the best advice I can given the parameters you mentioned in your earlier posts.
Regardless of what you buy, good luck! I hope you have lots of fun and success with your new gun
