Anybody here remember when we had CCC chambers, That was back in the late 50 s. A rebated neck. Thanks- Joe

I had forgotten about that line, that is going back a ways. I don't think I've ever seen a cartridge in real life, nor a rifle in that chambering. I'm not sure of the time line, but the Weatherby radiused shoulders may have been influenced by the CCC design.

Are you thinking/refering to the 300 PMVF also called the 300 CCC? Yes, I remember at least one...one friend had a 270 PMVF, we/I think...wouldn't keep 3 shots inside a 6" circle no matter what the load or bullet weight. This was a long time ago.

The rifle had a beautiful stock, lots of inlays and slightly wild looking, beautiful bluing, a small amount of engraving, but I can't remember the receiver brand...it WASN'T a Weatherby unless it was a very early precursor before his MK 5 receiver...and it wasn't stamped as to the caliber or cartridge.

Mic McPherson has a wildcat cartridge with a similar design for his levergun conversions. Interesting concept as to the "why" of the design.

Luck

I think you are correct on the PMVF link. It seems as though there were two different CCC's, but even they were related.

I think one of my books may have some info, just need to remember which one.

What is a "rebated" neck? I know what a rebated rim is-- it's a rim of lesser diameter than the body. So then, is a rebated neck a neck of lesser diameter than the body? Isn't that how it is already? I'm confused beyond words...

I think the nomenclature is off. The Ackley books show this cartridge. The shoulder is sharp but the neck has a radius like the Weatherby cartridges. The neck is described as a venturi.