I've always understood the "weight / twist" relationship as such:RECIT wrote:1:7 likes the heavier bullets like 62grn-72grn.
As your bullet gets heavier (thus longer), you have to spin it faster to stabilize it. Therefore, the heavier bullets perform better in the 1:7 barrels.
But I didn't think you lost anything by exceeding the twist rate necessary to stabilize the bullet (assuming you're not disintegrating it). I think he'd be fine using 55 grain bullets in a 1:7 barrel. Surely "overspinning" is not as critical to accuracy as "underspinning."
Let me know if I'm missing something....and I'm not trying to be a know-it-all; just don't want anybody to take a bath trading away 2k rounds of suitable ammo.
PQC.