I carried a 30-30 and a driven Boar hunt in the Ardennes about 20 years ago. It was a pre war (WWI) Belgian rifle. I can't remember who made it but it was nice and light and very quick. I thought it was marginal for Boar as it had no knockdown power on the bigger pigs and unless the shot was perfect tracking was involved.

It would have been a nice rifle to use with dogs on Cats and treeing BBears but on a ground Bear I would rather have the lever action and more rounds.

I know that the 30-30 has killed everything in N America dozens of times but so has the .22 Hornet and I would not choose it either for Bears. I grew up with a .32 Special which, is the same round, and have shot Deer, Bears, Coyotes and Steers with it. But that was because it was all we had, not because it was the best option. My Mother killed a pretty big Grizzly with the same rifle but it took her the entire magazine and a pocketful of cartridges to do it.