Just as the title reads. I was shooting my Weihrauch 30s today and everything was going great. After about 20 rounds I went to shoot it again and it was loud and I could smell something like ( dieseling ) ? Managed to get the stuck pellet out with a Tipon rod and the skirt was slightly deformed. Any ideas what caused this and it it safe to shoot again. ? The pellets were SigAir Flat 7.71 gr. Thanks