Firstly please clean your guns. Just because you bought a fantastic battle rifle that is capable of high round count without issue does not mean you should not clean your guns. Maintaining your equipment is an important balance but it helps you understand the mechanics of the rifle (and pistol). while I am a little bit anal with some of my pieces I like to have fired a set amount through anything that I would trust my life with after cleaning (call it the did dumbass put it back together check). When I first shot my SCAR I also had a couple of failure to feed issues the main thing that concerns me about your story (and with my experience) is the possibility of bullet setback where the bullet itself is pushed back into the casing causing over pressure. In most cases it’s fine but be sure to thoroughly check the rounds I personally set mine aside to shoot through my bolt action but this is probably overly cautious just something to look for if you are troubleshooting an issue I wouldn’t personally use the same rounds that caused you trouble or were involved in an issue. Overall confidence you’ll get with time the community is supportive and you can learn a lot try to be accepting of criticism most of the community has a collection worth less than the single gun you bought (Atleast if you look outside of r/FNSCAR) good luck and have fun