This study compares the results of a dispersion test with mathematical modeling. A 10-round group of modified 25-mm XM881 Armor Piercing Fin Stabilized Discarding Sabot projectiles was fired from the M242 chain gun into a designated target. The mathematical modeling results come from BALANS. a product of Arrow Tech Associates. https://www.chiggate.com/3m-speedglas-9002nc-welding-helmet-fashion/