North61,
Contrary to popular belief, bullets do not become less stable further downrange. They actually become more stable, due to spinning just about as fast while air pressure on the front end of the bullet decreases due to less velocity.
Your problem with the 225 AccuBond and downrange accuracy is due to something other than the 1-16 twist.
Well I don't know. I have a very accurate 358 Norma with a Heavy 14" Douglas barrel. With 225 Sierra's there is a fairly mathematical relationship with 225 Sierras from 100-500 yards.
.5 MOA at 100 and 3-4" at 400. That's normal for me and I think the relative opening of groups at 400 yards is due to wind and sighting errors (I use a Leupold 4X scope)
The 225 A-Bonds do well at 100 and don't keep the MOA as you stretch distance. 3/4" at 100 yards and 6-10" at 400 yards.
I have shot a lot of groups at 300-400 yards. It's possible I had some fluke good groups at 100 yards with the A-Bonds. Might not be statistically valid as I have only shot 2 groups of 3 at 100 yards with the A-Bonds.
