The Woodward Automatic was built for black powder cartridges. I would not have barrels made for a high intensity cartridge. The .450NE was among the highest pressure of the NE rounds at 17 tons. Yet the .375 Flanged Magnum even surpasses that with its proof pressure of 18 tons. Compare that to the typical black powder proof of 10 tons.

Yes I have a Woodward Automatic chambered for the .450/400 3-1/4" BPE. Yes it did pass nitro proof at some point in the late 20's or early 30's. Does that make my rifle a .450/400 NE? NOT FOR ME!

Link to my rifle: Woodward Automatic

Your idea in regard to your Woodward Automatic is misguided. I advise against it. What I haven't explored is how your rifle got to be chambered in .300 Flanged. That's already across the line, but another story.

Curl