What Djones is showing vs. saying is the 300 Hamm’r is pretty much out performing many of the AR chamberings - maybe even the 6.8 SPC... not to mention the Grendel.

The Hamm’r mirrors the 30-30 performance pretty closely, it’s more the terminal performance of the rig that people like.
Frankly the 6.8 SPC does a lot more meat damanage that I thought it ever would, so I’m betting the 300 Hamm’r is really a better round for under 250.