I ordered some magazines from a custom 1911 maker ( Wilson, Brown, Les Baer, Nighthawk etc ) for one of their 1911's. When I attempted to use these magazines in one of their pistols, they jammed the gun and were almost impossible to chamber. I had never experienced this before. I sent the magazines back. I thought, what if I had used them in my 1911 edc without testing them. Bad move. Shook my faith in the 1911. Should it be shaken?