How easy is it to convert a .22 RF Mag into a .17 HMR?

If re-barrelled will the mag, any feed rails, bolt face etc still work or what modifications would be needed?

I would like to source an old .22 RF Mag in a CZ or Brno and rebarrel plus ???. I don't particularly like the modern styling of any of the rifles offered in .17 HMR.

Thanks.

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A.17 HMR would work particularly well shooting small game such as hares, rabbits and foxes in vineyards. Also as the fragile bullet would be less likely to ricochet as compared to a .22 RF.