ColoYooper
Well-Known Member
- Joined
- Feb 17, 2013
- Messages
- 53
Interesting question about how Swarovski computes the True-Ballistic-Range (TBR). Here is my non-affiliated to Swarovski guess: They must compute the Time-Of-Flight(TOF) for the bullet to travel 800yards along the 30degree uphill slope. This would take into account the effect of gravity slowing the bullet down along the x component, in addition to the normal BC effect of air. Gravity would cause the bullet to arrive at the uphill 800 yard destination with a lower velocity than it would at a level 800 yard position. This would result in a longer (TOF). They would then take the COSINE(30)*TOF to determine the x component TOF and match this value to an equivalent level TOF to determine the TBR. It would be interesting if you swapped positions and read the TBR at a target 30 degrees downhill. I expect it would be less than 693 yards as gravity cause the bullet to arrive at a higher velocity than the 800 yard level position.