Thread: Fast twist barrels

Originally Posted by T.FOYE

No two 'identical' barrels produce the same velocity either, further skewing any results. Or rather it could be almost impossible to make identical barrels. I reckon this question could only be answered by a manufacturer using statistics from thousands of testfires...

Something i (if i were them) would never release. The moment it became known that there was a 50ft per second advantage having 1/7 twist on any model, the 1/8 would be chopped liver and hard to sell

Yes never identical but they can get damn close. Matches guys often by multiple barrels and own there own reamer and can reuse load data from previous iterations to damn near the same results saving redoing load development. So if Bartlien does a test and limits variation even more by using a reamer sequentially limiting difference and pulling barrels from the same batch of steel and cutting them sequentially I'd say they are a pretty good authority to say that it's insignificant.
I definitely think we can conclude that the difference in the to rifles mentioned in the original post is not significantly impacted by the twist rates and is more likely a result of different batchs of powder, bore diameter, tighter chamber, faulty chromo or incorrect validation of speed.