Quote:
Originally Posted by RogueMontanan
I have been trying to work up a Nosler Accubond load for my Model 70, 30.06. I have shot three ladders at this point and on all three ladders my POI is consistently between 1.5-1.75 inches left of POA.
My concern stems from the fact that my Nosler Partition group is dead center on the POA and slightly sub-MOA (0.90). I was hoping to work up a Nosler Accubond round that shot with the same center/zero with the better BC and tighter group.
I do not want to change the zero of the rifle, and would like to be able to shoot both rounds out of the rifle.
My COAL is 3.320", Barrel Twist is 1:10, and shooting at 100 Yards (rifle zero'd for 200 yards).
Any suggestions or explanation why the Polymer bullets are drifting left? I had chalked it up to barrel harmonics, but I tried to control for that by running the ladders at .5 and then .1 Grains each.
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This is my load I use in a Sako Finnbear in 30-06. Consistently a clover leaf pattern at 100 yards.
IMR 4350 – 53.0 gr – 3.340 COAL – Nosler Accu-bond 165 gr