The physical properties and compressive loading of six domestic sunflower hybrids were studied. The mean values of length width thickness geometric diameter surface area porosity single kernel mass sphericity bulk and true density 1000-kernel weight and coefficient of friction were measured at a single level of moisture content. The results for the sunflower seeds showed that the length width thickness and geometric diameter dimensions ranged from 9.31-11.52 mm 4.71-5.92 mm 2.95-4.87 mm and 5.12-6.31 mm respectively. The mean sphericity porosity static coefficient of friction bulk and true density ranged from 0.313-0.550 0.313-0.363 0.211-0.237 330.10-449.86 and 502.74-701.21 kg m -3 respectively. The objective of this study was to evaluate and compare the behavior of six domestic sunflower hybrids (Perun Bačvanin Krajišnik NS-H-111 Pobednik and Šumadinac hybrids) during compressive loading considering the seed moisture content. The seeds of NS-H-111 Šumadinac Pobednik and Krajišnik demonstrated low values of bio yield force ranging from 29.3 N to 45.2 N when seeds had a low moisture content (between 3.7 and 5.9% w.b.). The opposite occurred for the Bačvanin and Perun hybrids (60.6 N and 76.2 N respectively) within the same seed moisture content. For all the hybrids the machine head displacement (deformation) increased as the seed moisture content increased. The linear model shows a decreasing trend of bio yield modulus for all hybrids as the moisture content of seeds increased.