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Old April 20, 2011, 09:28 AM   #6
Clark
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Join Date: December 4, 1999
Location: WA, the ever blue state
Posts: 4,678
I know from shooting 75 gr Vmax in a 6mmBR with 14" twist, that at 2900 fps, the bullets may make a 0.1" group at 50yards, but keyhole at 100 yards.

So my fear with 7mmRemMag and 180 gr VLD bullets is great groups at 100yards, and keyhole at 500 yards.

And 7mmRemMag rifles come in baby steps between 9" and 10".

I realize this academic with 6mm barrels, that usually come in bigger twist increments.
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