Testing the Underwood XTP 155 and 158 gr 10mm and .357 Magnum ammo in my 4" S&W revolvers. The 10mm is a 155 gr XTP rated at 1,500 FPS and the .357 Magnum is a 158 gr XTP also rated at 1,500 FPS. I do a 10% Clear Ballistics Gel test and accuracy test. Always appreciative of any channel help :) [ Ссылка ]

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