I, too, just acquired my first 1914, probably made in 1915. During my disassembly and cleaning I noticed no damage or apparent excess wear. I also own a 1922 Ortgies, 1923 Walther Modell 4, and 1938 Walther PP. I have safely shot all of them on several occasions and I intend to shoot the Mauser. I stick with standard pressure FMJ ammunition, PPU at present, and limit myself to a few magazines per session followed by field stripping and examination. My other three old timers are none the worse for the experience and I believe the same will be the case for the Mauser.
I want all my guns to be at least shootable, whether or not I shoot them regularly. If I had landed a NIB 1914 or Feld Marschall von Hindenburg's personal pocket pistol my actions would be different.
If the gun isn't a rare collectible and doesn't show signs of stress or abuse, I'd shoot it, sparingly.