Long Proof Range (LPR) Khamaria successfully conducted study of pressure waves from indigenously designed Sharang 155mm/45calibre Artillery Gun System. The exercise was rare of its kind conducted under ‘Make in India’ campaign for the first time in the country. The study on Pressure Waves in an artillery gun chamber and measurement of differential pressure, a rare land mark and commendable achievement in internal Ballistics with significant impact on Gun and Amn design.