From what I gather about a grizzly charge, is you'll be lucky to get off 1 or 2 shots at said grizzly.

also a faster follow up shot might be a good thing, ie. 44mag > 454, 480, 500 etc...

I went with a 5 shot 44 mag taurus tracker, although I'm not sure the 41mag may have 6 shots vs. 5.

I other round I have thought about is the 10mm, but then you're talking about having the ability to take more shots.

I think maybe 1 of you has the 44mag and your buddy has the 10mm. ha.