I think you'll find it difficult to push 1.3 Gbps worth of traffic down a 1 Gbps pipe.
This is why Cisco's wireless solution for implementing 802.11ac, wave 1 is a very, very expensive solution. This is because the solution requires that the 802.11ac, wave 1 APs are to be directly connected to the 3650/3850 switches and no other.
There are other adapters out there that are 3x3 in which I have tested also. It really depends on the driver to be honest. Even on a 3x3, the card connection speed shows the same as your and that is max I have ever seen. Now the actual througout is a different story. What your connected at doesn't mean that your throughput is that great. Yeah it's better than 802.11n, but you really need a clean environment and you also have to be close enough to achieve the high rates of AC. Here is a list of AC products for reference: