Hirtenberger 22 LR red base Proof?

General Ammunition Discussion
#1

I picked up this Hirtenberger 22 LR with a red base at SLICS. I assume it’s a proof load. Is that correct?
Hirtenberger red base 22 lr HS

Hirtenberger red base 22 lr2
Hirtenberger red base 22 lr2791×250 62.4 KB

Thanks
Paul

#2

believe so & found as ball with other numbers