fire forming 22-250AI with used brass

[rich44]

I just picked up a 22-250AI barrel that came with 50 fire formed Norma cases. I have some once fired Norma brass from another 22-250 could it be fire formed in my AI or should I just use new brass to form, I have a few hundred Win cases and some Nosler brass but would like to keep all the Norma for one gun and Win for the other etc..

 

[CJ6]

Full length resize and anneal the necks on the used stuff for best results