To answer your primary question: The limited use you propose won’t hurt your gun in your lifetime.

A couple observations:

Those max loads are way overboard for home defense. A mild 44 special equivalent is more than enough.

Groups at 10 yards aren’t much use in evaluating 44 mag loads in a 6 1/2” barreled Model 29. The minimum range would be 25 yards. You’re not shooting a 380 Bodyguard, after all.