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New Contest Starting Now! This Target Haunts Me
Tell us about the one that got away, the flier that ruined your group, the zero that drifted, the shot you still see when you close your eyes. Winner will receive a free scope!
So the folks from Berger replied. I don't want to post their content but to summarize. At sea level, 1:9 is best, especially for the heavies (245). 1:8 is a bit fast but should stabilize the projectiles fine.
Having said this, I think I'll check with the folks at Berger and verify my ASSumption. Sierra recommends a 1:8 for their 230s. Berger is 1:10 for 208/220 and 1:9 for 245s.
I think it is going to depend on the projectile. Some of the newer magic-high-BC wonder bullets require a faster twist. I am just about to start load development on the 208 Bergers. It will be a bit of time before I am able to take them out far enough to really test them.