85g TSX is crazy wicked. I'm pushing them at almost 3,500 FPS out of my .243AI. 3,250+ should be easy out of a vanilla .243, which is still smokin'.
Here's one I recovered on a near full-length body shot at a distance ...
If I recall, this bullet weighed about 84.2g after impact/expansion. Traveled over 24" through the deer as well.