i like my browning rifles.

both of my browning medallion and BAR MKII safari chambered in the 30-06sprg.
the BAR has never jammed once on me. i tried putting as much amo through it to see if it will jamn. never did.
i bought some 180gr. rem core-lokt' s for just to practice and break in my rifle with. i ended up getting 2" groups standing up shooting with iron sights at 50yds.
my medallion in the same caliber shoots 1.080" at 100yds using federal premium ammo.the bolt is " slick as snot " it does no have the CRF bolt. but ti think they are better used if hunting heavier and dangerous game.
i have not owned a winchester, tikka, sakko, weatherby so i am not sure it these are better than the browning line. i do know that i have not had a problem with any of my brownings so i will stay with them for awhile.
from what i hear is that tikka is the way to go now a days do to the price and the accuracy out of the box.

BTW.. what kind of gun do you have in 300win mag? medallion, hunter series , micro hunter ? i do find the guns to be rather light and probally would have a bit more bite for rounds like the 300win mag.