420CaD to the door, for six listed above (3", bob rifled) from AUstralia
the problem is that it is next to impossible to get those from US, at least I dont know the way-I tried many places, which have long or short, rifled or not in US and they do not import and in Canada it looks like cool things nobody bothers to import... though these inserts is the way to go for the prepper... I remember Chiappa had inserts and they are long gone from Canadian market... though I am sure these products will be of extreme demand