Our instructor is teaching a variation of the type 3 clearance drill that requires you to lock slide to the rear and strip mag like usual but then you use overhand technique to release slide, insert new mag and rack slide theoretically extracting chambered round and chambering new round. Does anyone see any merit in this or is it asking for trouble ?. Also for a stovepipe i have heard some people advocate a tap-roll-rack to clear the problem but others claim this may cause a double feed if a round has left magazine feed lips ( I have tried to cause this but have been unable to ) . Any thoughts/opinions , particularly from other instructors, would be much appreciated as this type of knowledge in the hysterically anti-gun australia is hard to come by. thank you.