Poly is only describing the coating on the lead bullet. These are perfect for punching holes in paper or for hitting steel targets. As lead bullets dont fragment like a jacketed bullet. The coating leaves no fouling in the barrel making it ideal for practice, training, and match shooting ammo.
Yes these are new cases not reprocessed or pulled downs.
The cases are steel coated with 3 microns of brass. The purpose is to lower the cost of brass casings but yet have the lubricity from the brass coating.
This ammo is packaged in 6mil poly bags, 250 rounds per poly bag. 1,000 rounds in a case.