The NyClad ammunition was available for several decades
It was originally offered by Smith and Wesson. I do not recall the year when Federal took it over.
The Federal Syntec is basically the same coating but in red and without the nylon
I probably know hundreds of people that carried it, myself included. The 38 Special +P rounds were very popular for BUGs and off duty weapons.
Even with all of the ammunition "Advancements" I would have no problem carrying the NyClads today. In some cases I would actually prefer it
There was a South Florida department that used it as their issue ammunition. I can not recall which PD, but I know that they came through our range for qualification
I think I have a box or two of the 357 Magnum remaining in the ammo closet
Back in the olden days, I came into a 5 gallon bucket of NeClad projectiles. Some were double dipped in the polymer coating and were WAY to big in diameter to sort out. Instead of sorting the good from the bad, Federal just gave them away.
It took me several years to get through the bucket. Overall I tossed several thousand of the double coated projectiles in the trash