Getting ready to inlet a col virg. lock from jim chambers, .54 cal. smooth bore, oct. to round, 1 inch across the flats at breech. Would I be ok with a 1/4'' white lightning liner? Would I be wise to allow enough room in front of the breech for a 5/16 inch liner, just in case? Or just go with the 1/4'', keeping it just in front of breech plug, maybe 1/8'' or under. Would appreciate opinions. thanks, chuck