Like I said - Rifle only cartridges. But that's only my personal interpretation. Handgun cartridges over .40 cal, that rifles have been chambered in, technically could be considered big bore. For me, when I think big bore lever gun, my mind goes to rifle cartridges, like the 45-70 and .444, etc. To further blur the lines, both of those have been chambered in handguns. Though they were originally concieved as rifle ammo...
I probably actually will lose some sleep tonight, sorting through that mess...
