you are right. i use bb because it lets rb go in easy and using geox 2f, helps keep things cleaner. i dont use it on my powerbelts,i use clean barrel for deer now. but, i never got rust for 36 years using bb.now, i use sheath to store not bb.after all reading, i dont think bb is good thing for storing our guns but i like it for rb/concials and for patchs/bore buttons.