I realize numbers in the computer and bullet holes on paper can be way off. I am shooting a Remington sendero 300 rum 6.5 x 20 LR Leupold with a gentry brake. I am loading 100.5gr retumbo w/ 180 gr accubond. I have chronographed the load at 3350fps avg. I am shooting 2.8 inches high at 100 for a 300 yard zero. Here is the problem, when I shoot the 300 yd target, I am actually 3.5 in low. My question is how do I dial up to 400 yards or further if the ballistics info is that inaccurate at close range.
I am using the shooting chrony's ballistic program. Any suggestions other than shooting and documenting the poi. I am limited to a 300 yard shooting range. I am new to trying to strech the range but not to shooting out past 300 yad. I just have never had the optics to do it.
Thanks for the responses,
TXGS
Last edited by TxGunslinger; 08/28/07.
