Wind and spray don't work together. Using spray inside a tent would suck too. Personally, I carry both. spray and pistols. I would look at Underwood ammo for your 9mm. Stay away from hollow points. Look at the hard cast and solid monolithic bullets. In fact, I would probably buy both and alternate in the clip.
Edit: K1 beat me to it while I was typing. Great minds think alike.
This.
I spend a fair bit of time in grizzly country these days, and I carry both. After talking with the Montana grizzly biologist for an hour and a half about this and other grizzly related matters (how to be a responsible hunter in densely populated grizzly areas - mostly boils down to common sense and scent management), I’m pretty set on having both easily accessible and defaulting to spray first. For legal and effectiveness reasons, the spray is first priority. Flick the safety off and push the button while still in the holster or cargo pocket - get the spray in the air. Also, if you have a bear being aggressive and/or bluff charging at mid-ranges (10-30 yards?), with spray, you can get some spray between you and the bear as deterrent. MUCH faster deployment than a pistol and less need for precise aim. Since most grizz attacks are surprise encounters, this extra speed matters. And, if it’s windy, in a tent, ineffectiveness if spray, or other adverse conditions that would prevent effectiveness of spray, I carry a 10mm with BB monolithic copper bullets - I think they call it the dangerous game load.
Ever tried to shoot a pistol very quickly and accurately under stress? Very difficult to do, even for the well trained. And, I do not want to shoot a grizzly unless I absolutely have to. Don’t get me wrong, I would if I thought my life depended on it, but I’m going to default to other options first if I can.
And for what it’s worth, when I get in close proximity of grizzlies (last encounter was bowhunting last fall - bumped a grizz cub at 50 yards on a ridge at 10,000ft with no sow in sight….), I tend to reach for the spray as first option. Even being within 100 yards of them when you’re a long ways from the trailhead gets the blood pumping a little bit. No problems yet, knock on wood. They are cool creatures.
Just my personal thoughts and preferences. Your mileage may vary.
Mark