The convergence behavior of the all-electron full-potential linearized augmented plane-wave (FLAPW) method with the explicit orthogonalization (XO) scheme is tested on ferromagnetic bulk body-centered-cubic Fe. Applying a commonly used criterion relating the plane-wave and angular momentum cutoffs, l_max = R_MTK_max, where R_MT is the muffin-tin (MT) sphere radius and K_max is the plane-wave cutoff for the basis − the total energy is converged and stable for K_maxR_MT = 10. The total energy convergence dependence on the star-function cutoff, G_max, is minimal and so a G_max of 3K_max or a large enough G_max is a reasonable choice. We demonstrate that the convergence with respect to l_max or a fixed large enough G_max and K_max are independent, and that K_max provides a better measure of the convergence than R_MTK_max. The dependence of the total energy on R_MT is shown to be small if the core states are treated equivalently, and that the XO scheme is able to treat systems with significantly smaller R_MT than the standard LAPW method. For converged systems, the calculated lattice parameter, bulk modulus, and magnetic moments are in excellent agreement with the experimental values.