243AI or other in a short action
I am having a rifle built by a local smith on a Stiller predator short action (2.70 port) with a 28" 7twist 6mm barrel in a mcmillan A5. I had planned on a 243AI since I am already loading for this cartridge. But, I have almost decided that since I already have a 243AI that I should look for something with a little more ummph. What is available to shoot the 115s w/o having to pull the bolt to unchamber an unfired round with this action? I was thinking 6AI, but I think most manuals list the combined overall length with 115s at around 3.060. I had planned on the rifle being a repeater, but single would be fine. Any suggestions?
I admit that I know just enough to be dangerous.....but dangerous at ever extending distances.