Just considering the AI round, but need to know if there are any typical problems with reliable feeding of such from a M70 classic originally factory chambered in 270win....
If any problems are easily overcome, Ill keep it mind, if its a potential tempermental combo,may give the idea a miss.

i would think you shouldn't have any problem with that at all. i've got a 6.5x.270AI on a belgian '98 that feeds fine with no work on the rails at all.

I doubt you will have much of an issue.