Hello, I bought my first AR a few years ago and just started reloading for it and trying to get it shooting well. It's a Savage MSR-15 224 Valkyrie. When I first got it it had trouble cycling the handle, only a certain box of shells would work once in a while. I Tried moving gas block and can't remember if I had it fully running 100%. It's sat till today after I broke it down cleaned it up and went out to shoot my powder ladder. Well I shot 2 times and each time I had to turn rifle upside down and bang butt against tailgate while pushing down on charge handle. It was stuck bad, both times. After spent case ejected, I can work handle smoothly. I have no idea what I did wrong, if anything when I broke it down to clean. Haven't had time to break it down again yet, just wanted to see if anyone knew where to look first? Thanks, only 100rds maybe through rifle.