I had the same issue a while ago with me 3rd model dragoon, and after some tinkering i found that the wedge pin was in too far. it took a while for me to get it just right but that did the trick. As for the 777 powder, i havent live fired it too much mostly just blanks, but I found that the 777 wasnt really all it was cracked up to be so i just use goes 3f powder. However im not too sure which is better when it comes to live firing.
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