The paper deals with a study of buckling behaviour of a bar, which is fed into the drawing tool in the production of drawn bar. When the undrawn bar is inserting into the two-die drawing tool by using hydraulic feeding collets, it can be buckled and stuffed between dies. Accordingly, basic parameters, such as a maximum possible buckling length, have to be found. Due to a specific shape of the drawn bar face, but also due to other parameters, the usage of basic equations for the calculation of buckling stability is questionable. Therefore, the numerical simulation in the ANSYS software was used. Based on basic calculations, numerical simulations and practical experiments, conditions under which the current bar feeding method can be used is found, followed by results comparison.