Sooo I know you don't want to do new calibers for the Modern Varmint, and I know you just have tonnes of free time anyways, what with the Grendel builds and such, buuuut.... wouldn't this be pretty awesome in the MV?
http s://www.range365.com/federal-224-valkyrie?CMPID=ENE103017
I think the 224 Valkyrie would make a great addition to my MV