I’m thinking on starting a new project for the 280 AI. Looking at reloading manuals and different cartridge looks like the 30-06 would be one of the best choice to start with. I would purchase a used rifle and have it re-barrelled for the 280AI. Would the 30-06 be the best choice or can I look for 270 Win. 25-06 Rem. or even 7 mm R.M and 300 W.M. work as for action length ?
As for the used rifle, would one brand work better then another. I was considering a Winchester Model 70 because seams to be lots of 270 Win. floating around for sale. Any input would be appreciated...

Thanks...