The load data in manuals is at a certain level for many reasons. How many rifles since 1905 have been built on actions that shouldn’t be pushed beyond original cartridge parameters? I don’t know Mauser type actions that well, but there is all kinds of information out there for them, and some are known to be better than others depending on where and when they were made. The manuals have to account for all of this, and cover their butts in case someone tries to push it in a rifle they shouldn’t. I agree with you that bullets are designed to function well within certain parameters, but usually they cover a rather large velocity range. Aframes are simply amazing bullets, I love them so far. They only mushroom so much. I’ve posted pics of some I have recovered. Had those bullets been going 200fps slower, you can look on their website to see the difference in what they would open up. So speed does matter, it adds effective range. The all copper bullets need more speed sometimes just to open up properly. I think the best thing that could be done is to have different load data to cover these firearms over the years, just like they do for 45-70, which has three different sets of data in Sierra, and two sets of data for most others. But how do they do this for a predominantly bolt action centered cartridge, with 150 years with of Mauser actions manufactured all over??