Hello.
I cannot prove this, but here's what I heard years ago from a fellow at the LASO: Nyclads fired from a P7, which has polygonal rifling, could not be matched up to the pistol that fired it. At that time, the Glocks had not come out and I would guess that there were few unexplained shootings involving P7s especially with Nyclads. Could it be that with the intense popularity of the Glocks, that this has become an issue, one that's not publicized, but one that influenced Federal's decision? I don't know how correct any of the above is, but it is a possibility. A dealer, who does/did carry Nyclad told me that he didn't sell much of the stuff compared to other Federal loadings. Perhaps one or both of these are why?
Best.