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