--- KODIAK HUNTER --- Living on K. Is. you should have access to lots of expert scuttlebutt . Talk to some local Guides .
There is a tad of contradiction in your request for opinion . --- The kind of rifle you need for possible 200 yd. shots while hunting , --- is not the " right stuff " if you suffer a , for-real , charge .
I'm a big .444 fan , --- but Browns can get massive so IMHO , -- I think you should tilt towards .45-70 .
Consult the Beartooth bullets Website raid it for all it's worth .
Similarly raid Garrett , for info .
Consider only heavy-for-caliber , big meplat , hard-casts .
.450 Mag. is great , but I have some misgivings about belted cases feeding as infallibly as straight cases . --- They tend to tilt around in the magazine more ( tilt around upon feeding too ) .
---- Sooo , I believe I'd go with straight .45-70 . et.cum.
Buffalo Bore or Garrett .
For a CHARGING Bruin , I believe I'd take a hard look at EOTech's Holosight ( they make a Bushnell model too ) . If they're good enough for Iraq , -- they're pretty dependable .
------- Hate the looks of the damn things on a lever gun ( sacrilege ) -- , BUT IF YOU LOVE LIFE , -- they have extremely fast target acquisition during a charge , and they work like dynomite in reduced light .
I'd consider a fast handling , 16 to 18 " barrel for close-in ( as in " Guide-Gun " or " Trapper " types .
And I'd have a first class feeding job done on the rifle after furnishing the gunsmith with dummy rounds of the the exact ammo. you're going to hunt with .
Maybe port the weapon to facilitate fast follow-up shots
Why ? --- Because I'm thinging Bear CHARGE here .
Absolutely read Herrero ( Phd . ) 's book -- " Bear Attacks "
Then read Garfield's -- " Bear vs. Man " ----- You'll know which weapon to choose .
But , getting , Off-Topic , a little , we were fortunate enough to get the Editor of Bear Hunting Magazine on the old ( Defunct ) Marlin Forum a few yrs. back ; --- and he said the .458 Win. was about as good as it gets for stopping a Bear CHARGE . ---- And they don't make a lever gun for that Pill . ----- So you got to consider them apples .
But if you're still determined to push through the Alders with a 200 yd. HUNTING - type rifle , You might opt. for a 24 " .45-70.
I'd still suggest only Buffalo Bore or Garrett fodder , -- a good brite Scope , a rangefinder , --- and pray you don't ever surprise one up close .
One more item for your consideration . According to the folks that study these animals , --- they charge at forty ( 40 ) feet a SECOND ! --- the Browns / Griz . are famous for taking lots of lead and still killing the persuers .
You are not assured of a STOP with a center-of-mass hit , with anything less than .458 SP ; -- otherwise , you're trying to hit the brain and spine , --- which one Pundit said is like trying to hit a grapefruit with a salami attached to it , --- bouncing toward you at 40 ft. / sec .
A lot of Guides think you shouldn't try the big ones at more than 100 yds .
Believe if it were me and I was alone , -- I'd take the short .45-70 and the Holo-sight .
But don't believe you should do that ( i.e. , alone ) .
Hunt the big ones with a .375 or a .458 , and have one or more good shooters along for back-up .
---- IMHO ---- Regards , ---------- MMCOUGAR .