Since I was the one to bring up this in the other thread, guess I should add my 2 cents. I used this example to point out the difference between a miss and an unfired round "scored as a miss" as Grizzly Dave posted SHB page 22. When the instructions say engage 10 targets with 10 rounds from your rifle and you only engage 4 targets for whatever reason, the shooter could not make up the 6 unfired rounds since they were not "misses", they are only scored as misses. I believe the best this shooter could have done was the 6 unfired rounds scored as misses even if all the targets were knocked down. This was some time back, but I recall the 3 targets left standing were actually pistol targets, which messes up the whole idea that 3 of the 6 unfired rounds can be attributed to the 3 "missed" targets, since they could not have been "missed" by the rifle. So 3 misses and 6 unfired rounds = 45 seconds.
Similar scenario, 4 KD SG targets must be engaged with 4+ SG. Targets are positioned in such a way it is easy to hit 2 with 1 shot, yet if the shooter does not "engage with 4+ rounds" they incur a "unfired round" 5 second penalty even though all 4 targets went down with 3 shots.