I firmly believe that using a head with a trocar type point is far superior to a COC type head when a bone hit occurs. I've never had any type of damage to trocar type head other than nicked blades. I have had COC heads severly bend on impact.
Allot of COC BH's aren't as strong as people think, but not all of them are weak.
I myself will take a good strong COC BH any day over a chisel point BH.