I found a block today on an overclocked Asus GTX 970 (4GB memory). Running the newer miner with the -s 0.2 and -c 1 set it is reaching 450 MH/s.

When running this I noticed it only uses 70% GPU.  Of course I am not using a "custom coded" miner so for kicks launched the same instance 3 times and the collective hashrate looks higher than if I was running individually 250/244/72 MH for each. 566 MH/s total and GPU use goes to 90% I am not sure if this is more effective or not but will run overnight and see what happens.