If "punch" means penetration, you would be completely wrong.
270 winchester The famous jack o'connor round. How do you think it would be for larger game such as moose, elk, large bear and such ?
Was thinking about the energy at impact.
The above is one outfitter's opinion.An outfitter's take on the best cartridge for moose hunting -
http://www.outdoorlife.com/blogs/hunting/2013/11/outfitters-take-best-cartridge-moose-hunting