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controlled expansion
An expansion joint, or movement joint, is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials, and vibration, or to allow movement due to ground settlement or seismic activity. They are commonly found between sections of buildings, bridges, sidewalks, railway tracks, piping systems, ships, and other structures.
Building faces, concrete slabs, and pipelines expand and contract due to warming and cooling from seasonal variation, or due to other heat sources. Before expansion joint gaps were built into these structures, they would crack under the stress induced.
50 round box of Winchester
45 +P 230 gr Ranger SXT
Law Enforcement Ammo.
It's the new version of the
Black Talon Rounds similar to what is shown in the photos.
The example image is of a black Talon that was fired into (top down) a 55 gal barrel of water to show expansion.
This is some of...