vintage ammo: not for carbines?

[ithacaartist]

Originally Posted by DonVoigt

My experience with "old" .30 luger, from the 60s timeframe, is that Winchester, Remington, and Peters are all too weak to function a normally sprung luger.
PPU and some batches of Fiocchi will function my shooters, but not all lots of Fiocchi will.

I'm wondering what the cut-off date might be. I have several .30 Luger shooters that function with any brand or vintage of ammo with no problem, the US made ammo--Remington and Winchester--included, although I have yet to acquire any old Peters. I might have used up one of the old green Remington Kleanbore boxes of ammo in the mix, and if so, it did fine. Did American makers change the powder/charge spec at some point?