I just picked up some Danish SS109 ammunition, made by AMA.
This is “naked” ammo, having no green tip.
The first thing I noticed was that the meplat is much finer than the M855 specification ammo that I have, being about .15 calibers, vs. approx .175 calibers for M855.
Previously, I had been unsure as to the ancestry of the ballistic shape of the 5.7x28 SS190 projectile, as it seemed to have a finer .15 cal meplat than M855 with which I was comparing it. Comparing the Danish SS109 to SS190 seems to clinch it: SS190 is a modified SS109 shape projectile.
Here are some pictures:
They came packaged on ten round plastic stripper clips in tough, low density polyethylene pouches:
The plastic stripper clips are much less of a PITAS than USGI style stripper clips:
I’m fairly convinced that SS190 is simply the SS109 bullet shape seated almost up to the ogive, with a shorter shank and boattail and a plastic core instead of lead:
Here’s a report from the BRL detailing the ballistic differences between SS109 and M855. I also have BRL ballistic data showing that SS109 has a slightly higher form factor, which is consistent with the changes made to M855 specification.