Question for those that have done this before.

I now have about 350 brass cases that were fired in my Wylde chambered AR. Some of them were already once fired, remanufactured brass purchased at a retail outlet (HSM, 55 GR, orange box from Sportsmans Warehouse) and some of them were new federal 55 Gr from Wally World.

Do I necessarily need to full length resize this brass or will neck sizing only be the proper thing to do? I have both the Lee full length sizing die, the collet neck resizer and the factory crimp die.

These will never be fired in another gun.

Thanks a bunch.