Other version of the 3 BIS F2 TRAP SKEET, this cartridge has been studied for the new shooting discipline double trap. It consist in throwing simultaneously two targets, whose the former is hit at a distance of about 26 mt. It has been proved that, at this distance, the best pattern is obtained in using shotsize 8,5 (Ø 2,2 mm) with 4-5 decimillimiters choked barrel. Lead dose is 24 g.