Wasn't this case actually involving factory ammo? As I recall, the defendant was using a marketed self defense load and claimed the event took place at close range. The prosecution "re-enacted" the event with a generic commercial loading and had stippling results that were different from the original testimony. On the stand, this info was used to impeach the defendants testimony and was a large factor in his conviction. On the appeal, ammunition bearing the same lot number was found and the test repeated. Here it was found that the stippling matched the defendant's testimony and the conviction was overturned.
The point that was being pushed, as I understood, it was not that reloaded ammo would convict you, just that it is not able to be replicated as factory ammo can be which may lead to problems in the defense. If the correct factory ammo would have been used, the trial and especially charges may well have been avoided which is the real objective as even an acquittal can break a person financially not to mention their reputation for years.
Factory produced items have a legal standing that our homemade items do not, even if we implement our own lot numbering system. As was brought up in the article I read regarding this incident, how many prosecutors would allow the defendant to make his own evidence for his own behalf? It still requires a judge to make the final decision but I'd guess what that would be, after all, how many are former prosecutors and how many are "liberals" that are not keen on the ownership or use of firearms?
As far as reliability is concerned, I have had many more recalls on components than I have had on factory manufactured ammunition. Including any and all misfires I've seen with factory ammo, the component recalls still outnumber them. I have not had a misfire with recalled components (sometimes I've used some/all of them before receiving the recall notice) but there was some reason for the recall and that was a potential reliability problem. Odds are either will fire when needed, I just like the idea of me or my survivors having a financial alternative with the factory ammo.
In the end, it is up to the individual to make the decision for themselves. Mine is for factory loadings for a variety of reasons, others may choose their own for a like number of reasons.