358 Gremlin/Grendel. Straight neck up to 358.
They are getting around 2300-2350 with a 180 gr bullet over lilgun with a 17" barrel.
I am having a 20" barrel made. I think this is going to be my night hunting upper to use in combination with a N750 Pulsar NV scope.

AR15 though and now the 3 month wait for a barrel.