Yep, that surplus ammunition is garbage, paper bullets, no use what so ever. I think that if your only concern is hunting, then stick with hunting rifles, that being said, as stated meany times in the hunting forum, placement is key. I'v known meany people use the 7.62x39 as a Varmint round and done the job just fine.
I would love to see a bullpup in a .308 tho, i think that would be quite a lot of fun. Put me down, I would be interested in one.