Ok, I will repost the question in a separate post.

So, I have to share my reloading experience with this cartridge, because it is frustrating. So the big 3 ammo makers produce a load with 170 grain bullets going ~2100 fps in case someone fires one in a .318 Mauser by mistake. It makes this cartridge perform like a 30-30. Then a couple of manufactures like Nosler and Hornady produce a load with a bullet close to 200 grains that is going 2400 fps, so that appears to be the “hot” load. So the velocity range of this cartridge becomes 2100 – 2400 fps based on the US factory offerings. Then, if there is any US reloading data available at all, it usually remains under 2550 fps for a 200 grain bullet.

So when data for a 8 X 57 JS Mauser with a velocity over 2600 fps pops up, it looks dangerous as compared to everything else offered in the US. The reality are probably another 10 or so powders that would produce velocities close to or over 2600 fps and still remain below the CIP max. So to reload this cartridge, you end up spending a bunch of time searching reloading boards for bits and pieces of info just to climb back to “normal” (not max) velocities.

I am sure there are other cartridges that present challenges, but this one is a tough one to crack.