I'm going to call you on that...
Begin by explaining why barrels are made in different twists...
(Why not just have a 7 twist for everything?)...
I'll post an article later to explain the reasons for this, but for now, we can just discuss it.
Remember, we're talking about long range accuracy... I have not said they won't shoot okay at shorter ranges (to about 250 yards).
Dan
they don't spin faster past 250 yards. they spin faster 0-250 yards.