Bolt gun owners sooner or later short shuck the bolt in a panic, and then become part of the food chain if they are alone. That's why you see so many doubles in dangerous game areas. You meet a bear at 100 feet with a bolt gun, and he's gonna be ontop of you almost instantly. You might get two shots off, while a guy that has a lever gun should get four or five.
The .405 Winchester is an excellent round, but really not much better than the .444 (well a little better). Both push a 300 grain bullet a little over 2000 fps. (2200 verses 2100fps). Of course you using a case that's almost a half in longer and near impossible to find these days. A .450 with a 350 grain bullet is similar in power, and the 400 grain bullet is a serious stopper on anything in this hemisphere. Then you take into fact that 90% of the end users will never plan on reloading any of the big bores as they only plan on shooting a box of ammo a year at the most. I like the .405, but out of the box Hornaday loads for the .450 are much easier.
gary