I "had" similar problems with 64 FV-SR that appears to be solved. I did a bit of smoothing/sanding/trimming on the magazines to allow the rear portion of bullet to rise earlier in its travel to barrel...i.e., become horizontal quicker. Many articles on this by searching. Other thing causing the malfunction was soft lead nose deforming and stopping on sharp edge of barrel opening....mine was jamming on 6 o'clock position. I used a piece of 800-1000 grit sandpaper on the tip of my finger to very lightly remove the sharpness of the barrel edge from about the 5-7 o'clock position. I've gone many rounds since without malfunction.
Bookmarks