Paradox barrels would be great, but who makes them other than Holland? With the barrel wall thickness on Fosberry style being over .090 in the muzzles, suitable barrels to be rifled would be difficult to find. Any orphan Fosberry barrels out there??!!

On the rifle caliber, I am leaning towards the .375 Flanged magnum withe the .303 next. With the .375 scoped you can still shoot big game and my eyes are fading....
John