Hi Alan
I have a SIERRA V6 balistic programe and if you send me the data from your gun/round combo ie scope height above bore/velocity/target size for point blank zero ( i use 1.5") i can send you or post it on the site a ballistic chart with either 20gr V/Max or 20gr HP heads i dont have dogtown or Noisler on the programe but my Noisler HP,s shoot the same as Berger 20gr match/varment and i assume that the dogtown will be very close if its a HP round
Wally