Jack was stellar and I am sure that today's bullets would also influence his opinions as he was also a student of bullet construction (his experience with the .375 Silvertips, etc) and other than the very inaccurate Nosler of his hay day cup and core ruled the roost.
That said, I think he would love the .270 130gr load even more, and he wouldn't suggest using anything above 180gr in the 30-06 either. I think he would still have 3 and 3 in the end.
All that is not my version of it.
In 1975 Jack wrote an article on 50 years with the 270. I have the article, in fact I posted a copy of part of it on CGN some time ago. In the article he states that Wichester developed a 130 grain bullet to go with their new calibre in 1925. Remember, he wrote this in 1975, and he stated that the original 130 grain Winchester bullet was superior in the 270, to any 130 grain bullet he has ever used in the 270. He said it was that bullet that was responsible for the great reputation the 270 soondeveloped. He said it was costly to make and Winchester dropped it and started the Silver Tip.
After that Jack said he used Nosler partition, almost exclusively.
I never before heard of the early Nosler being inaccurate.
There were a lot of very good bullets around in the 1950s. Right after the war Fred Barnes again started up his bullet making, which had been closed during war time. The first bullets he made were drawn from copper pipe, the same as you could buy in a hardware store. This gave them a tremendously thick copper jacket. The core was then soldered/welded/whatever, to the jacket.
These bullets got a high reccommendation from Jack O'Connor, who of course wrote them up in outdoor life. My brother read Jacks article on them, then ordered a few hundred in 30 calibre, in each of 150 and 200 grains. I have shot moose with each weight in a 30-06. Even the 150 grain made one shot kills on moose, as they opened up, but stayed together and penetrated to the far side of a moose. What more is a bullet supposed to do?
The 200 grain bullets Barnes made were far better for large, tough animals with big bones.
I still have about five of the 200 grain variety.
There were many other good bullets around. There was a Germna made partition, but I forget the make.
Herters made a lot of low priced equipment, but they also had a bullet that was pricy for them, but second to none and had a great reputation in Alaska on their large moose an big grissly bears.