Don't worry about the bullet length or barrel twist, they are not used in your calc only I think for corrialis (mmm spelling) effect which is the distance the earth spins/moves whilst you bullet is in the air - artillery stuff ha ha. Corrialis should be turned off by default.
Get your scope height set correctly - Shooter usually defaults to 1.5" Measure bore centre to sight centre.
You can also enter a zero offset in for your 100yds zero 2" high. Edit looks like you may have applied that offset?
Biggest learning curve is the atmospherics. Have fun.
Bookmarks