The 6.8 ammo might be harder to find. The 7.62x39 ammo is out there, but will the mini 30 shoot it accurately I don't know(I would love to have one). I would go to with the 223. It works on hogs also. Check out my post in general chit chat.
Varmints with a Mini 14?
I know it's not the answer you're looking for, but the AR-15 is a much better, more reliable, easier to maintain and accurate gun. It's also a bit pricier...
I'm confused as to why you say the AR is more reliable and easier to maintain.
I'm confused as to why you say the AR is more reliable and easier to maintain.
However Bill Ruger did not design it to be a high volume blaster so its no wonder it does not do well in that role.