We shoot Remington .357 mag 158gr SJHP ammunition from a Smith & Wesson Model 13L with a 4″ barrel into Clearballistics ballistic gel to measure velocity, penetration, expansion/fragmentation, and retained weight.
Buy it at Ventura Munitions:
Guns in this video:
Smith & Wesson Model 13L
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Hoppe’s No. 9 Gun Bore Cleaner: A favorite since 1903
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