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A comment on Experiment: Recoil vs. Muzzle Velocity. Parent comment

Re:Experiment: Recoil vs. Muzzle Velocity by i_am_proteus on Friday December 21, 2018 @04:37PM (#18736884)
Snap caps make great "dummy" rounds for these drills on semi-automatics.

https://en.wikipedia.org/wiki/Snap_cap

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