Hello, I purchased my csa vz-58 a few months ago. Since then I've put about 750 rounds through it. I noticed lately that everytime after shooting when I was cleaning that my brush was getting looser and looser. I thought my brush was worn out so bought a new one and also a boresnake. When I tried to clean last weekend I used my boresnake for the first time and it was like a hotdog in a hallway. I'm pretty new to owning guns, I assumed that over time a barrel could wear out but not this fast right? What's wrong with my gun guys?! Thanks.