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January 3, 2012, 04:28 PM
They've been out for several years. I've seen them at the SHOT Show for about the last 5 years at least. I've got a box of them down in my shop. I'll go look at the label later on and give you the brand name.
I don't believe I'd reload them, as neck tension may be problematic the second time around.
Hope this helps.
January 3, 2012, 04:29 PM
PCA Spectrum .223 55gr. Google "plastic .223"
January 3, 2012, 04:30 PM
Polymer casing, used to reduce the cost of manufacture.
for a little more info.
January 3, 2012, 04:47 PM
http://i338.photobucket.com/albums/n420/joe1944usa/Polymer.jpg Looks like yours are different? Or its just the photo.