Thanks for the weight update....! But the 10mm still does NOT carry the horse power of the 44mag, and man it is just not hard to carry a 4" Smith in the mountains horse or no horse ... I used horses and pack mules as a 'former guide', and for personal use as well for almost 4 decades in the rockies and other ruff terrain. Sometimes, as I shared with the OP, afoot.
And all carrying a Ruger 44mag 4"+ barrel and 33rds spare ammo on the belt. I never fainted, or wore out or cratered under it... ha.
If he is concered about bear, then forget the 10mm (which I have owned for many years and load for) high caps mean nothing to me in this senerio
. The revolver trumps the semi, especially if ya have a bear 'on you'. The 44mag, trumps the 10mm in horse power with 250/300gr Hard Cast bullets.
First two shots is it any way, NO ONE
is going to dump a mag load into a charging bear !
Ok, a tad more weight than I figured, but the Ruger Vaquero, and BH, even at 4" + and 5" + are much hevier than that, but I have never once had a concern with them in high country, and even on very steep climbs where the sheep are..
Stay safe !