Bryan, Just read your new "Twist vs Sg" posting with appreciation and much interest. A few additional ponters for your considrration and inclusion: 1. I usually start a rifle project with the intent of the rifle then the best bullet for that intent. 2. With the candidate bullet, I then order the barrel specifics as to twist and groove specifications. 3. In the case of Berger uld's I use their suggested twist as in 1-10 ( way off the "logical" meter ) for their new 120gr 6.5mm. 4. The twist should be compatable with the desired effect on the target. For example a new Mil 6.8mm round will only have a Sg of 1.1 or so which is just stable and will probably tumble on contact--not a bad thing unless one is on the receiving end---. 5. The "Where's the Beef" set like my son, who eats all they shoot, wants penetration with expansion which may require a faster twist. 6. The ultimate accuracy shooters are at the ragged edge of stablility attempting to minimize dispersion through a slower twist which may find that ( Per Shillen chart) a bullet at the raged edge of stability at cool dry SL conditions may NOT be stable in the hot, less dense conditions at a higher elevation shoot. I happen to use a Sg of 1`.35 as my baseline but we are now seperating black pepper from fly droppings--. Your work is first rate and I intend only to add to your good posings in hopes that all will benefit. Well done, Sir!!! Keep it up!!!Cordially, Overbore
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