While at first look, the BORS appears interesting. However it does have some weakness.
1. While it deals with bullet characteristics, barometric pressure and temperature, there is no mention of wind velocity which must apparently be calculated and entered manually, as does RATT (Range to target which apparently must be determined off line.)
2. Similarly, target speed and angle of incidence which can affect the prediction are not mentioned.
3. Other problem is you are tied to one rifle by the physical attactment of the device to that rifle.
In my view it was a gallant if misguided effort. As my disertation chairman used to say, it requires a little more work.
Rick addresses these issue by attaching a sticker to his scope cover.
or for nearly $2800 you could get this:
The Barrett Optical Ranging System (BORS) is an exciting new development in long range shooting. The integrated electronic ballistic computer couples directly to the Leupold Mark 4® rifle telescope acting as the upper rear scope ring.
• Measures air temperature, barometric pressure, and bore line angle
• Calculates a ballistic solution for a specific user-selected cartridge
• Eliminates the need for "counting clicks", calculating mil dots as target ranges change, or using a handheld computer
• Allows the shooter to focus on environmental conditions, assess the tactical situation, and quickly engage multiple targets at varying ranges
• Takes the mystery out of bullet drop