since when can you use a .45 mag in a .40 gun or the other way around?
I did an experiment tonight with modified 1911 mags(7 rd) in my JCP.
The mags fit, as one might expect, but I couldn't shoot more than three rounds before getting a nose up FTF.
The 1911 mags need a spacer in the front like the JCP mags to keep the rounds positioned toward the back of the mag.
If anyone has ideas about what would work for the spacer, please let me know.