Greetings @
Micky Duck,
There is a sound reason why there are not many .270AI rifles around. Both factory and hand load data is pretty stout and there is not much to be gained. Converting any of the 06 chambers to AI gains around 100 fps and often less WHEN LOADED TO THE SAME PRESSURE. In the .280 and .30-06 cartridge factory and hand load pressure is lower so there is more to be gained but you can gain some of that just by loading up to .270 pressures. I did attempt to watch the video but started to lose interest when he pointed the rifle at the camera with the bolt closed. In the interest of science I fast forwarded till the shooting started. Within a few shots he had expanded a case head with an overload and decided that there was little or nothing to be learned by watching any more.
I had a .30-06AI for a bit years ago and found it was only marginally better than the standard version when using pressure tested hand load data. I see from my notes I got 2,830 fps with the 165 grain Hornady in a 24" barrel and fire formed cases.
Hope you are feeling better tomorrow.
Regards Grandpamac.