Were the bullets ever matched to the empty cartridges ?
There is no such thing as matching a bullet as having come from a specific casing other than by circumstantial evidence.
Bullets and cases are matched to the gun they were fired from. Obviously when bullets and cases are tied to the same gun then the bullets are associated with those cases. When there are multiple cases and bullets fired in the same location there is no way to narrow down which case specifically was tied to each specific bullet.
Master Bedroom
Sheila
upper wound (chin) PV/19
lower wound (neck) PV/20
cases they were fired from: DRH/1 and 2. There is no way to know specifically which case goes to which of these bullets.
Nevill
PV/10 (lip)
PV/11 (jaw)
PV/2 (Shoulder)
DRH/5 (Arm/chest Graze wound)
June
PV/25 between eyes
PV/26 above right ear
DRH/35a lower neck (bullet exited into pillow)
DRH/35b forearm (bullet exited into pillow)
PV/24 right upper chest
PV/23 lower chest
DRH/9 knee (bullet exited into bed)
There is no way to know with specificity which of the 11 cases corresponds with which particular bullet fired into June and Nevill we just know the 11 bullets came from these 11 cases: DRH/3, 4, 6, 7a, 7b, 8, 10, 11, 12, 13 and 43
Kitchen
PV/8 front of right ear/exit left ear but still in the body
PV/9 slightly above wound 1
PV/3 top of skull
PV/4 top of skull
The 4 cases associated with these shots are: DRH/14, 19, 20 and 41.
Twins Room
Daniel
PV/34
PV/35
PV/36
PV/29
DRH/36 (bullet exited and landed in bedroom)
Nicholas
Left cheek bone
Left of bridge of the nose
Outer aspect of right eyebrow (fragmented into small pieces no fragment from this bullet recovered by Vanezis)
The 8 cases associated with these shots are: DRH/16, 17, 18, 37, 38, 39a, 39b, and 40.
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So it can only be narrowed down so much which case went to which bullet.