My January 2014 column in Shotgun Life, which discussed shotshell pressures and the kinds of barrel damage excess cartridge pressure can cause, generated quite a few reader responses. Several readers contacted me requesting I also devote a column to barrel damage caused by obstructions. Before going further, any time there’s a topic of interest you would like covered in this column, please e-mail me. I pride myself in being 100% responsive to readers’ interests.