I think it's the matter of software - in pentathlon you don't fire five times, you fire until you shoot the target five times (or until 500 secs pass by). I don't know, how it can work in biathlon, maybe it will change, so not until five shots fired but until five meeting the target - then you have an extra "bullets" not only in relay. But it can be also five fired and then you go further and additional "bullets" in the relay - then the software should be also in the rifle, not only in target - a little bit challenge for a producers.