[Rupert]

I was talking about what we see in UT. In UT is can be seen from how the number of shots and damage scales in pistols and rifles that damage is proportional to the cube root of power (as with Pyr #3-37). The rules for using power cells as explosives imply that for TL10-11 there's a four-fold increase in energy density for power cells (also as in Pyr #3-37). These two things, combined with the doubling of damage for the same weight of the TL11 cannon compared to the TL10 cannon mean that the TL11 version must have either times the power output for the same weight, and twice the efficiency.

How you should reconcile this with Pyr #3-37 I can't tell you.