And what in your opinion would be the the way any normal person would handle bullets when loading them up into the magazine of a gun? And, do you consider Sheila Caffell to have been normal in this respect, even though according to those from the opposite camp she did not know one end of a gun from the other?
I have observed many different people loading bullets up into the magazine of a .22 rifle, and many of them handle the brass bullet case with the fingers of their hand, and load the round into the magazine, tip first and then press the base of the cartridge down and into position so that it sits inside the ammunition magazine snugly. All of this without touching the lead bullet head part of the round, now why would it be different in Sheila's case?