Years ago a co-worker came into a Luger bringback his dad had brought back from WW II. This frend called me on the pnone one even ing and asked me about handling it. I told him, as best I could, how to load and fire a Luger. He was so anxious to shoot the gun he rushed out to a Walmart and bought a box of 9mm Luger and headed to the range.
Later that evening, he called me from the range, saying the ammo he bought would't fit.
Yep, his was one of those .30 Luger variants.
I never liked firing the Luger as that toggle link kept jumping up and interupting my sight picture when fired. Plus that awful recoil impulse inherant to auto pistols.