Hornady says 49.4 gr IMR4064 170 gr RN 2.89" OAL and says 2900 fps for a 24" barrel.
Quickload thinks that should be 2698 fps 48,104 psi.
What? Hornady published a wimpy load with that is really 200fps slower
SAAMI registration of the 8x57j .318" 1888 Mauser is 35,000 psi
SAAMI registration of the 8x57s .323" 1898 Mauser is 35,000 psi
CIP registration of the 8x57s .323" 1898 Mauser is 56,564 psi
http://en.wikipedia.org/wiki/7,92_x_57_mm
CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
In my humble opinion, the 98 Mauser is a much safer platform for the Mauser case head used in the .270 cartridge design than many modern sporting arms commercially chambered in the 65,000 psi .270.
I don't think that the registration of a Mauser case head at 65,000 psi in the .270 was a good idea for mass produced ammo in millions of different guns, and that may be why new registrations of the Mauser case head in 260 Rem are at 62,000 psi.
I do feel that the individual handloader can load his .270 to 65,000 psi and get useful safety margin without fear of sticky bolt or loose primer pockets on the first usage.
If I were putting IMR4064 in a 98 Mauser behind a 170 gr Hornady, I would take 65,000 psi as the upper limit. That would be around 54.5 gr IMR4064, 65,000 psi, 2954 fps 24" barrel. But that would be 106.8% powder fill, and it may not fit.
51 gr is 99.9% powder fill and that will likely fit. It would be 52,827 psi, 2779 fps.
And that pressure would be kosher in Europe, where the rifle was likely made.