So I'm just getting into the idea of buying a tactical shotgun for home defense. What are the pros and cons of semi-auto (and within that, gas powered vs. inertia powered)? Are pump actions really that much more reliable/durable? Does one require less cleaning than the other? Also, I've heard about shotgun rounds that are packed with glass pellets rather than lead as a means of making them safer to use in a home defense situation (less likelihood of over penetration). Anyone know if these actually exist and if so who makes them?