{HEAD ~ The ballistic compensation information} can be indexed by density altitude level to enable adjustment of the firearm scope to adjust for varying atmospheric conditions and {TAIL ~ range distances} 
{ HEAD ~ The ballistic compensation information } can be indexed by density altitude level to enable adjustment of the firearm scope to adjust for varying atmospheric conditions and { TAIL ~ range distances }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL