Bob Nelson 35Whelen
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MilehighshooterWell, there IS a guy on another forum who is likely running 270 Win to modern belted mag pressure claiming 2250 (and i have no reason to doubt him) experimenting with some more modern 223 powders. Most of the guys running 400's are using 4895. I really need to buy QL and play with some powder options.
Just ran some numbers thru load from a disc, the best I could come up with was a,400 grain @ 2,000 fps and that was at 52,000 cup or about 60,000 psi. That's with modern powders as well including cfe223 that was only 1800 fps loaded at 100%. Older powders like 3031 did better. Looked at about 8 different powders and 4 different bullets.
Cheers mate Bob
Sorry to rain on your parade but 400 grains at 2,000fps will still get the job done
I could be wrong