"Ballistics by the Inch" (BBTI) is a research project and resource focused on the study of the relationship between the length of a firearm's barrel and the resulting velocity and performance of various ammunition types. The initiative is particularly aimed at understanding how different barrel lengths can affect the ballistic performance of handgun cartridges. BBTI conducts extensive testing with a variety of common handgun calibers and different barrel lengths, measuring the velocity of projectiles fired from these firearms.
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