"Need" a .260 or 7mm-08 to fill the monster gap between my .257 Roberts and my 7mm RM. (laughing)
The medium-weight 6.5-06AI fits in there but is too heavy to pack around the mountains (it was built for antelope and long range play from a bench). I figure a 20-22" tube with a .264 hole would be just the ticket.
Got a couple of other vacancies at the extremes as well - a .223 to go with my .22-250 and anything in a bolt .35 and up.
Time is running out (turned 61 today) - gotta fill the holes so I can enjoy them before its time to pass them down.