Shimming the valve spring on the Hatsan Gladius and Chronograph test 08 09 18

This video shows how to increase the power of the valve spring in order to tune the Hatsan Gladius. When opening up the transfer port for better air flow it increases the power. By increasing the tension on the valve spring this count acts that effect and allows you to bring the rifle to the correct muzzle energy by increasing the tension on the hammer spring. The video shows the shimming of the valve spring and the follow up chronograph tests as the rifle is tuned. The cylinder will be used as a spare cylinder, as a new one on order will then be tuned and fitted with a Robert Lane Mk9 regulator.

Видео Shimming the valve spring on the Hatsan Gladius and Chronograph test 08 09 18 канала Airgun Sniper-Elite