I subscribe to the theory that the longer action cartridges are good, the optimum short action cartridges are great and the Micro action is excellent at pushing a 129 grain spire point at a more than adequate velocity to take dow the average White tail or Mule deer at average ranges these critters are taken. 6.5x57, .260 & 6.5 Creedmoor & don't over look the Micro 6.5 Grendel.