I wouldn't push an antique top break, or a cheap pocket revolver. But I am sure any post war N-Frame will handle the 7.5 load with ease!
SAMMI is the industry "Watch Dog" and they have to look at every gun every made in 44 special. So as ALL guns get old, the reloading and factory ammo have less pressure. Many things changed in the 50 or so years between when the 44 Special and the 44 Remington Mag were introduced.