For sure the 450/400 would be more recoil than the 25-06 but ive seen 458 win mags that had muzzle breaks that looked pretty controlable. I also have some 450/400 black powder load data that would bee pretty cool to see that big billow of white smoke come rolling out the other end. With a muzzle break the 450/400 will probably be pretty managable plus it the smallest nitro express round and the cheapest to reload for.