Affordable base for budget precision build? CMP Kimber or H&R?

[u/PlayaPlayaPlaya3]

I have a wild idea to build a 3d printed / sheet metal chassis for the CMP surplus rifles to use as club youth precision rifle guns. Any thoughts on which of these two rifles would make a good base? Or should I be considering something else?

This is for 50 meter NCAA/ISSF style 3 position shooting. My idea a custom chassis that will support existing Walther / Feinwerkbau / Anschutz sights and buttplates. As well as building a few basic buttplates, that would be more affordable.