I will get pictures up.
Personally, I feel it a bit light for bear and put it in the Medium deer and antelope category (open country)
. However, although not a dedicated Bear caliber, it would probably do the job. It is just not my first choice.
My other MKV is in 7mm/08
It moves the semi standard 100 gr. 'pill' at about 3200 fps.
This can be matched witht he 6mm Rem, maybe, using Norma 205.
IMR (as opposed to H4831 surplus 50cal powder) 4831 will have to do as the Norma Powder is difficult to obtain.
I will post pictures of my 6mm stable (FN-Husquavrna and the new MKV alonside their respective cartridges.
The 6mm Remington is the most punch for the money, and I opine that the Remington 700 i(n 6mm in this 'class) is the best rifle for the money, now that the Model 70 has been taken from us.
A "controled feed' rifle woud not be necessary when using any of the 6mms.
Karamojo Bell used the 'parent' cartridge of the 6mm Remington to down (again no longer a PC thing) over 100 Bull elephants using solids (solid heavy guage copper) with his beloved 7X57.
Barnes makes solids for US use and they would be of special help in a .45-70 bolt gun which can be raised to 'grizzley' killer quick if one's action is strong enough and the load developed with care..
The Nosler, as noted, is otherwise the prerferred bullet, especially in any attempt to use a 6mm on med/large game.
Sierra makes a 104gr match bull in 6mm, but it fouls barrels (which need to be at least 1-7 twist) very quickly and the match rifle I had built to use the 104 gr. projectile shot well, but fouled too quickly---sort of something we do not consider in these modern times.