Thanks for the confirmation. The Hirtenberger is reserved for my subguns (Uzi & Sten), and I store it separate from the other ammo...just to ensure there will never be a mix-up!
I've read that Lugers have stiffer actions & that the ammo used during that period was hotter. It left me wondering just how much....
Not that much!
So, I'll back away from the Hirtenberger, grab some WalMart Winchester, and report back with a new range report later.
Thanks Gentlemen!