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| From my experience, they do push a little grease out of the coupler, when pulled off the zerk. I blame it more on the grease than the gun. If there is air in the grease, that could expand and push grease out, when the pressure is released. Also, an air pocket in the tube would air-lock the gun, and prevent you from completely emptying the tube. How do you store your grease? I have noticeably more issues when tubes are stored laying on their sides. | |
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