Haven't done this for a long while but, we used to get a hacksaw and cut down the length of the neck, then site a projectile at the end and close the bolt quietly. Done three times and you had a good idea of where the lands were.
Haven't done this for a long while but, we used to get a hacksaw and cut down the length of the neck, then site a projectile at the end and close the bolt quietly. Done three times and you had a good idea of where the lands were.
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