[PGR88]

So what kind of rifle can take out a grizzly with one shot at close range, with such power the grizzly can’t even lunge at you in its death throes?

[Jewbacca]

“So what kind of rifle can take out a grizzly with one shot at close range, with such power the grizzly can’t even lunge at you in its death throes?”

A really well-placed .22 could do it.

But I’m guessing a .300 Weatherby or its like.

[Mariner]

"with such power the grizzly can’t even lunge at you in its death throes?"

I don't think such a rifle exists.

I assume a lot has to do with the disposition of the bear. If he's angry and/or scared you'd want at least 50ft. 100ft would be better.

[envisio]

30.06
44-40
7.56x54
454 casull

All these can make a canoe out of a bears brain pan.
Of course that is only the few I have... there are endless calibers to add to that.

[uncbob]

12 Gauge shotgun with punkin balls