This brings me onto the levels of lead deposit found on the hand swabs that were supposedly taken from the hands of Sheila Caffell at the scene by DC HAMMERSLEY, as opposed to the lead deposit levels found on the hands of volunteers at the lab' a long time afterwards who had all handled 25 bullets...
Seems somewhat obvious to me, that the results from Sheila should not have been compared against these volunteers, because to begin with at best the most bullets Sheila might have handled was only 14/15, not 25 (Jeremy had loaded the others).
Therefore, the results taken from the volunteers needed to be rounded down by dividing the net result pertaining to the level of lead deposit on the swabs taken from them, by 25, and the result obtained multiplied by 14/15...
You would then have got a far more accurate assessment of the expected levels of lead deposit you might expect to find on the hand swabs of a person who had potentially handled 14/15 live rounds...