Arc Laser
BushNell Elite 1500 arc laser rangefinders?
does anybody own this rangefinder?
it seems to work well, iam told to sight in the gun dead center at 100yds, then match the calibre gun iam shooting with a coresponding letter ( think its like a-f) but i lost my dvd and i have a 300 win mag. i think it was letter f that was the 300 wsm which i was going by. but i dont want to assume that they're the same.
It is F.
Ballistic charts:
http://www.bushnell.com/products/rangefinder/ballistic/ballistic.html
Manual:
http://bushnell.com/customer_service/manuals/rangefinders.cfm
You might want to just check the ballistics for your particular round. Lots of manufacturers provide information. Even that can vary, though. If your barrel is longer or shorter it will have more or less velocity at the muzzle. You may want to go to a range and do some practice to verify your range card for bullet drop.