Thanks for reaching out Thomas! Yes sir, if there is green paint on the tip that indicates the M855 bullet, which contains a seven grain steel penetrator. That is still invaluable ammo for you to keep in supply; it is suitable for self-defense, as it pierces barriers as substantial as steel and may split in half while penetrating soft tissue in order to track two individual wound channels. Do not consider it a loss to have ammunition like that in storage.
We currently do not have nonmagnetic FMJ 223 or 5.56 in stock. The nonmagnetic 223 Rem options we currently have in stock are both loaded with the BlitzKing bullet by Sierra, which is highly accurate and delivers terminal performance optimal for varmint hunting. Any round loaded with a polymer tipped hunting bullet will cost more than an FMJ, and as such is not ideal for target shooting.
Our inventory does change frequently. We may very soon have the brass-cased, nonmagnetic ammo in stock that you want for your range. I hope you'll check back in again soon to see how we can be of better service to you!