sized fin stabilized practice projectile including wings or vanes which are radially fixedly arranged on the shank of the projectile the wings or vanes possess auxiliary vanes which extend transversely of their main axes and wherein a hole which is produced in a target board by the fin stabilized practice projectile corresponds in general with the diameter of a circle about which the auxiliary vanes are located on the projectile application_number US 45269689 A description a guidance mechanism 1 is constituted from a tubular guidance member 2 with six wings or vanes 3 these wings or vanes in a manner known per se are equipped with sharpened edges 4 arranged on the wings 3 at a spacing 5 therefrom are sharpened fin stabilizer like auxiliary vanes 6 with cutting edges 16 corresponding oblique edges 23 are located pursuant to fig3 facing in a direction towards the guidance member 2 the auxiliary vanes 6 are located at right angles relative to a radial distance 15 from the axis of a guidance mechanism and in effect at respective distances 8 9 from the outer edges 4 and 10 of the vane 3 the auxiliary vanes 6 relative to the radial length of the wings 3 are arranged somewhat at a 1 3 distance 5 in the direction of a guidance mechanism member 2 an open space 11 between the ends 18 of neighboring auxiliary vanes 6 consists of about 40 or 50 of the radial length of the vanes 3 as suitable materials for the guidance mechanism.