I'll agree that "less lethal" options are something to be carefully considered. HOWEVER, DO NOT make the mistake of thinking anything that goes in a gun is not lethal. It is.
People have been killed by blanks! Ok, it takes just the right conditions, but it has happened.
Rubber bullets, and all the things that are sometimes called "less lethal" are really "Less likely to be lethal". They all can kill, when things go just "right" (or wrong, from the other point of view).
Another thing is the use of "deadly force", and how different places regard it. IF it comes out of a gun, the law may regard it as deadly force, no matter what it is.
OR, if it is "less lethal" ammo, you might find yourself in the legal can of worms that opens with "you chose "less lethal" ammo, because you didn't believe deadly force was justified"...and if you don't believe deadly force is justified, you are not justified in shooting, ...etc....
So your claim of self defense becomes charges against YOU for assault!
Stranger things have happened...