Yes, the percentage of explosive to the weight of the projectile was an assumption I had to make in my early work, because there was not any good data available for most of the shells we were comparing. Since then, I've found alot better data (I have it for most all countries now from original source documentation) and Tony wrote his book which contains that data as well.
Luftwaffe guys. Please realize that mine shells were not used exclusively. Even at the height of the bomber offensive in the West (where they used a larger percentage of mine shells) mine shells were only 1 in 3 or 1 in 4, in a standard ammunition belt. So to do the calculation correctly, you must account for ammunition mixes.
I don't have a copy of it handy, but I did this once on a spreadsheet with all the correct data, and accounting for ammunition mixes, and it still comes out the same. The Hispano is more effect in damage and ability to hit than the MG151.
FD my webpages are gone, lost to the great HD crash ghost of the internet. My webhosting company switched servers and lost all my webpages, and almost simultanesouly I had a HD failure on my computer at home and lost all the copies of it there.
