All mathmatical formulae that attempt to display/compare ctg. killing power fail due to simple aspects of bullet construction, penetration, attendent tissue destruction and different game reaction to nerve shock - at the time of impact.

Too many important factors to be condensed into in a mere number.

I always used to like the TKO #'s or Elmers Pound-feet - but now realize my first paragraph is more accurate. No fomulae work. I still prefer big and slow because it seems to, for me. Maybe that's the real test. - HA!