Some members here have had real good luck with the Fiocchi JSP ammo. My experience with that ammo in MY 30 Luger handguns has been dismal to say the least. The Fiocchi 92gr FMJRN has functioned wonderfully for me and my guns. These rascals can be/are ammo sensitive. Your mainspring/recoil spring may be the culprit, but the ammo test with the Fiocchi will help with the diagnosis.
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