bcarver, I disagree with your comment that less osilation means less verticle stringing. Long, whippier, flimsier barrels have oft times got less vertical shot stringing than shorter, stiffer ones.
Especially if slower bullets leave later in the barrel's whip than faster ones and the velocity spread is large. The more bullet drop downrange from the slower ones is compensated for when they all leave on the barrel's upswing. That was proved over a century ago with the British .303 rifles and it still holds true today.
It all depends on where the bullets leave in the muzzle axis as the barrel oscillates (whips) vertically.
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