No need to check with anyone, but go ahead if it makes you sleep better or you think there may be some kind of local ordinance.
As a new gun owner or new to firearms your question is a good one.
Velocity and weight are strong contributors to penetration also muzzle energy.
If you are defending yourself and deadly force is called for the encounter must end quickly.
With that you don't want a wimpy round that will not incapacitate as fast as possible.
Central nervous system hits and loss of blood pressure is what does the job.
A big concern for home owners is over penetration, people in another room, bullets exiting a house or apartment and going street bound. Most bullets will penetrate sheet rock of the common 1/2" or 3/8" thickness. The WC has more mass than the 125 golden saber
the WC is going slower the 125 GS is going faster.
If we are talking about GS HP bullets hitting a target ( human ) they will slow down some
do to the parachute effect of the HP as it opens in tissue.
Thinking a HP bullet will mash on impact and slow down when hitting an object not human is not going to happen most times. As in very often. Why ? because the HP bullet depends on hydro licks to open, it's the fluid in the HP opening that opens the bullet. You want to achieve as much energy dump inside the target, bullets that go through are wasting energy and keep going.
Here are some links to a very viable option made by Corbon. Glaser Safety Slug at Dakota Ammo - CORŽBON/Glaser Self Defense and Tactical Gear Glaser Blue Safety Slug Ammo 38 Special 80 Grain Safety Slug
38-special-80-grain-safety-slug Glaser Safety Slug? http://www.brassfetcher.com/Brassfet...afety_Slug.pdf
Check them out, you should get some info, if you don't like those at least you have an idea of what is being said and why. + there are similar rounds to be had.
Hope it helps.