.357 mag would be pretty great...
I'm going to go out on a limb and say that the action isn't designed for centerfire bolt thrust forces. There is a .17 HMR version in the US but the importer seems silent on the prospect of bringing that into Canada.
.357 mag would be pretty great...
.357 mag, you need an H&R or NEF. The "Little Badger" wouldn't be very "Little" after re-engineering it for .357 mag....? Even .17 WSM, as in the comment above, would be a stretch (17WSM@33000 psi vs 17HMR@26000 psi).
How about a "little T-rex" in .50 BMG?