Other
But then I am old skool and don't know better...
First off the gun has to run and with every mag with ammo.
Second, most mfg's have designed a gun to work with certain AND many are sighted in to work with a specific bullet weight and other criteria.
Third, and gets back to reason number two, a gun needs to shoot point of aim/point of impact [POA/POI] with ammo.
Fourth, and this often comes into play with injury, or age, with situations such as Arthritis, a person needs to be able to quickly and effectivley make hits. Meaning if they used to could shoot 158 grain .357s, but their situations have changed, and in "investigating and verifying" on paper, with five rounds at five yards they shoot .38spls, even target wadcutters best, that is the load for them at that time.
Hence the reason this dumb ole southern boy still prefers 158 grainers out of dedicated .38spls and .357s for instance...
So for me, the brand is not as important as the other criteria I just posted.
*but-i-don't-know-better*