Sell it & buy a new one... You'll be glad you did

You didn't mention what you are going to use the new caliber for. Targets, mice, moose, squirrels, yotes, or?
If squirrels, rabbits, fox & targets are the main game, then I vote for a 223
If mostly for coyotes, bobcat & such I like the 204 Ruger
If a combo varmint/deer caliber, a 243 sure is sweet
deer only... sky's the limit, from 243, 25/06 & 270 etc etc
Good Luck in Your Decision
Frank