Neat stuff yobuck, that is some interesting info.
Did you have good luck with the 7-300 back then in the hunting grounds? Do you remember your longest shot?
Well first i need to make a correction as to Huntington, his name was Fred, not Al, and he later started RCBS.
Als last name was Freeland, and he was also well known in the shooting world back then.
As for the 7x300 Wby, yes it was and still is one of the better long range cartridges in 7 mm.
Its as simple to load as running a standard 300 Wby case thru a 7x300 die in order to neck it down.
It was sorta pushed aside when the 7 mm STW came along due to that becoming at least for awhile a factory offering. But balisticaly they are pretty much identicle.
The 7 mm ultramag has a slight edge velocity wise over both of them, assuming it is loaded to its max of coarse.
We have killed lots of deer over the years with the 7x300 Wby, and many of them were shot by kids.
My personal longest with one was 1200 yds, but i would be recommending more gun for shots that long on large animals.
When the 180 gr Bergers came along we bought a box and compared them to the 162 Hornady for trajectory out to 1200 yds.
In both the 7 ultra mag and the 7x300 Wby the 162s took less clicks on the scope at 1200, no doubt due to initial velocity diference.
So there is a correlation between B C and B S. at least to some point.
And that point is further than we should be using 7 mms.
And 6.5s also i might add. lol