Hello there, I'm new to this forum, and as I browse the comments I see im not the only one having these problems.. I recently purchased both the mka1919(1st) and then a few months later the Saiga 12. I bought the 1919 and realized that mag capacity was gonna be an issue, As I could not find high capacity mags, not the problem.. The problem is that my 1919 Will cycle high brass and anything really with a velocity of 1300 and higher with a 99% efficiency..but the bulk ammo Will not cycle the Winchester super is about the only bulk ammo that has over 1300( that I can find). I tinkered, cleaned and shot for a while, got annoyed, and moved on to calm down.. I then purchased the saiga 12, I heard a lot of good things about them and I own a few AKs and never had issues with any of them.. So I thought an AK 12gauge.. Holy crap DESTRUCTION.. So I get it home and grab a bulk box of Winchester ammo universal number 7 I think, loaded the mag went outside to play.. I fired about 4 rounds and it jammed every time.. So i adjusted the plug to the factory 2 setting and it still FTE every round. I took it inside cleaned it and checked the gas ports, there were 4 holes in the gas block?..cleaned all the carbon from the block, reassembled reloaded and got the same affect, feeling disgusted started reading forums, saw a lot of positive feedback on the reliability kits from Carolina I think it was, so I ordered that, as well and installed the kit, well the kit didn't help at all with the bulk ammo.. But like the 1919 it cycled better with the 1300 fps. But still ever 2 or 3 rounds it would FTE, from what I could tell it was short stroking. High brass and buckshot shot fine, haven't fired any slugs through either weapon. I'm a little disgusted to the fact we pay this amount of money for a weapon to half function, if these weapons can only fire high brass or heavier loads they should be advertised as so.. But guys any help with either of these weapons would be greatly appreciated..