The barrel length to enter into the ballistics calculator is the length from the case base to the barrel muzzle, as indicated in the image. You'd best measure the barrel length, including the tronion, and then deduct the tronion length.
The barrel length to enter into the ballistics calculator is the length from the case base to the barrel muzzle, as indicated in the image. You'd best measure the barrel length, including the tronion, and then deduct the tronion length.
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