If you do a search under the deer hunting thread type in 30-30 in your search and there is a 3-4 page response. I was debating if the 30-30 would be a good enough gun and I got and overwhelming response of yes. There are pics in the response of guys who used their 30-30 to kill big deer.

However, if you are going to be taking shots past 200 yards I would go for something like 7mm. With that being said the 30-30 is one of the best deer rifles ever!!!