$79270 is where all the spell power bytes are stored for weapons, but I thought that was discovered already.
Wow, if you actually calculated those power values before looking them up...that would verify the algorithms you've been using. That's why spells produced from items are so much weaker than the actual casting, isn't it? I just thought those bytes were a direct substitution for the spell power.
Hit rate is solely dependant on the spell being duped (I -believe-).