FFP scopes
1. Check the calibration of the reticle at home or the range. If it is a Mil or MOA reticle make sure the hash marks are accurate.
2. While hunting if an animal is to be ranged determine if it has an average body size or is smaller or larger than average. Adjust the "Animal Size" to suit the target animal.
3. Steady the rifle and measure the number of MOA or Mils between brisket and back.
4. Use the following formula to calculate the range
Animal Size inches/(MOA X 1.047) = Range (in 100 yards)
Animal Size inches/(Mil X 3.6) = Range (in 100 yards)
This might not be totally correct being as it has been a number of years since I used a reticle to do my rangefiding.Second Focal Plane scopes
1. Check the calibration of the reticle AND THE POWER RING at home or the range. If it is a Mil or MOA reticle make sure the hash marks are accurate at the prescribed power.
2. While hunting if an animal is to be ranged determine if it has an average body size or is smaller or larger than average. Adjust the "Animal Size" to suit the target animal.
Method A for a Pre-calibrated scope such as a Nightforce with NP-R1
3. Steady the rifle and turn the power ring to calibrated power index mark.
4. Measure the number of MOA between brisket and back.
5. Use the following formula to calculate the range
Animal Size inches/(MOA X 1.047) = Range (in 100 yards)
Method B for general SFP reticles
1 Calibrate your reticle at 100 yards to a known measurement such as 10 inches and record the power setting that bracket that "Target Length" and which parts of the reticle you used.
2. While hunting if an animal is to be ranged determine if it has an average body size or is smaller or larger than average.
3. Steady the rifle and adjust the power ring until the animal is bracketed by your stadia.
4. Read the power from the power ring.
Use the following formula to calculate the range
(calibration power/ final power) X ( animal size/ target Length)= Range in hundreds of yards
I use Goggle earth everyday but never thought to use a print of a stand site!Just for the heck of it I printed off the deer anatomy pic blew it up to 125% and it comes out the right size to glue to the back side of my google earth map page.lightbulb