Did you enter the correct twist and the correct BC for the twist in your rifle.
Example my 264 win has a crap factory twist of 9. The 140 gr, Berger BC has to be deflated from.307 to .295 G7. I believe off the top of my head.
That slower twist will make it appear that the rifle is slow to get the numbers to match your ballistics calculations.
Matching the bullet to the twist and actual BC with said twist will reveal the velocity clearer. The important part is to enter all values in the ballistic calculator exactly.
Last edited by fredIII; 11/01/16.
