Two things
1) Find a skeet range so you can practice shooting moving targets. Bad guys breaking into your home are not usually going to stand still for nice aimed shots
2) There
are some saboted slug loads that work fine in a smoothbore (my handloaded round ball loads that use a shotcup, for instance, great accuracy) but most factory sabots will give disappointing accuracy
As someone stated above, shotguns are one of the most confusing types of firearms, so many variables to consider
