In order to analyze feasibility of applying sand projectile in vertical target test, spin-stabilized projectile's characteristic quantity was measured before and after refit, and they were all distributed normally by K-S test. On this basis, it is obtained that significant difference of projectile's characteristic quantity before and after refit is polar moment of inertia by using independent T-test. For example of kilometer vertical target test, it is proved that distribution characteristic of sand projectile's characteristic quantity refit based on present technology has no significant effect on vertical target test result by using 4D trajectory model of spin-stabilized projectiles to do simulation calculation and analyzing the practical vertical target test data, so sand projectile can be used in vertical target test.