Ruger American .223 Remington Accuracy

Short accuracy test of my Ruger American rifle chambered in .223 Remington at 100 meters. I use a fixed 6 power scope with thick German #4 reticle. I have tested three different ammo brands.
I had a problem with magazine (last round did not feed into the chamber). Also the stock has some issues. I can not use a bipod because the stock flexes too much and the barrel is then not free floated (see last target with awful group).