I just cleaned my new gun for the first time with a rod and patch and about half way through the barrel there was a lot of resistance and had to use alot of force to puch the rod through? was wondering if this is normal of if maybe it could have damaged my rifling? it wasnt a brass rod it was a carbon looking one and when i pulled it out the end of it was a little bent so i threw it away. just wodering if i could have done any damage?