Re: best long range short action round
The problem with some of those mentioned is they will not feed through short actions with long, heavy, high BC bullets for long range shooting and should be built on a long action because of that. With all things considered the 243 AI would be my choice for your purpose. In a well built rifle you should have no problem shooting 5-9 inch groups at 1000 yards. It is extremely accurate with good barrel life and long range bullets can be fed through the action. This is one of the most consistently accurate 1000 yard chamberings ever.
Predictions are difficult, especially when they involve the future