JSB Exact 5.1mm 500 is a precision .20" caliber shotgun with a rounded head, commonly used in FT and HFT field competitions.
JSB Exact is a high-quality shotgun shell valued by air rifle shooters for its excellent precision and repeatability of shots.
The .20 caliber provides an ideal compromise between the accuracy of 4.5mm shot and the high kinetic energy of 5.5mm shot.
