I think the "aluminum hood' (which makes sense) would be an aluminum tip in American English as in "silver tip" Winchester ammo. Dixon's was written for collectors and does not contain any ballistic information, much less loading data. It is true that cases can be made from 9.3x74R, but actual measurement shows actual head diameter is less than 7x65R, which itself is smaller than 5.6x61R. I don't have either 6.5x65R or 6.5x62R to measure but am informed that either one would be closer to 5.6x61R. Bertram and similar commercial cases almost always show "not in stock" and usually unreasonably priced. To load the 70 grain 22 HP bullet to 3,000 fps I consider IMR 4895 better than 4350, because reducing the 4350 load that much puts it into the area everyone cautions about and 4895 is a medium burning rate powder while the cautions are for slow burning rate powders. The reason to limit the 70gr bullet to 3,000 fps was it was for a 2,800-fps cartridge and did not give acceptable accuracy over 3,000 fps. If there was a 70-gr bullet intended for higher velocity, it would not need to be limited. We have to be careful with this cartridge because it is easy to mix up data for the rimless and rimmed versions, the old, published velocities are questionable and predate the common availability of chronographs. Most of us trying to match the old velocities with actual chronographic results have found it unwise, if not impossible. If anyone can figure it out with the modern powders and bullets, wonderful. Let the rest of us know the answer.
Mike