Allen,
I suspect you're right about the pressure problems with the .416 Remington, but am merely reporting what I have heard from several PH's, and not just during certain periods, but recently. I have no reason to doubt them, and they have no reason to tell tales.
I suspect one reason for the occasional problems with the .416 Remington is the standad American tendency toward hot handloads. But the fact remains that unless you try to turn the .416 Rigby into a .416 Weatherby, it will never, ever show any pressure problems, even in 120-degree weather.
As I said, I own rifles chambered in both cartridges and like them both a lot--and the .416 Remington is my second in the chambering. My post was merely a statement of fact. The .416 Remington is a fine round, and one I have found quite easy to load, but any potential user should be aware of potential problems, especially those that can be easily avoided.
