I inherited a winchester 190 .22 from my grandfather,and had not taken it to the range until a few days ago when I took it along to the range when shooting my Saiga.Before leaving I cleaned the bore with a patch pulled back the bolt and cleaned the action.Everything looked ok but at the range I fired 1 round,inspected the casing and noticed the lip of the casing had a dent,so I put the 22 away and finished my session with the Saiga.Would the dent in the casing be from the shell being hung up during the cycling process,maybe from a need of a more in depth cleaning?