I went out shooting today and had some odd issues with Saiga. It was only my second time out with it and it seemed like the last shell in every mag I loaded would not fire. Sometimes more than the last shell but mostly the last in a 5 round factory mag. The first time I went out I didn't polish anything and had the factory puk and plug in and it ran flawless. It kicked hard so I figured it was over gassed. Today I ran it with the V-plug, twister puk, and polished bolt carrier and bolt and for some reason that last round stayed in the chamber and didn't fire. There was a small indent where the