https://www.jhnewsandguide.com/this_just_in/article_07ef8702-644f-5f6f-86e1-9b3505df00b0.ht

Excerpt:

The Wyoming Game and Fish Department on Monday released new details about the fatal mauling of hunting guide Mark Uptain last weekend, including that bear spray was deployed.

“An investigation found a discharged can of bear spray with the safety off near the body,” Game and Fish officials said in a statement. “It was later determined that the sow (female bear) had been sprayed with bear spray.”

The complete investigation is still ongoing, the notice said, and will continue with a forensic analysis to provide additional scientific evidence.
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It would appear, at least in this case, and several others actually published as of late, the bear spray is NOT working... the guy who got hammered by a griz near my home town last fall dumped an entire can on the sow as she was coming in..the guy said she blew right through the pepper spray cloud and kept coming...

Each to their own but I will continue to use a gun vs spray..