+1 on the Leica's LRF binoculars. THE best on the market.
They have a Micro SD card you can remove, put in an SD card holder, insert into your computer and download all your rifle's specific ballistics from the Leica ballistics site.
You load your exact ballistics (i.e.muzzle velocity, barrel length, twist rate and direction, bullet weights, BC and other data required by the program. Do NOT rely on the muzzle velocity on the ammo box or a reloading manual. Take it of your own rifle, and if you have to, borrow a chronometer.
Re-insert the Micro SD card in the binoculars and its sensors for air pressure, temperature, compass direction of shot, inclination, etc. will sync with the data card and give you your hold EXCEPT for wind.
Eric B.
PS. you may have to do a home equity loan to buy the very spendy LEICA LRF binoculars, even the HD-B 2200. Jus' sayin'...