You are correct HB that the rifle ammunition is waxed and this aids lubrication. Loading does tend to leave some residue on the hands. The waxing does not make it more difficult to handle the ammunition. It is quite a thin film.
. Thank you NGB, So, would it be fair to say the fingerprints then become Patent fingerprints, meaning when transferred with oil, grease, blood the fingerprint is visible to the naked eye? Latent fingerprint is normal fingerprints, through sweat etc not visible to the naked eye.
So if Sheila had reloaded the Mag three times and handled 25 bullets, she would have had to have wax on her fingers and palms of her hands, possibly transferred such to the rifle while shooting? From this I would assume the shooter most probably was wearing gloves?