My standard load for my Nova was a magazine full of #1 buck, plus 3 rounds of #00 Federal tactical, and 3 Federal tactical slugs in the sidesaddle, and it will be for my Super Nova, as well.
There are some who, out of concerns about overpenetration, subscribe to the concept of loading the first few rounds with birdshot, followed by heavier shot. The thought being that if you miss with the first shot, the birdshot is less likely to overpenetrate walls. I prefer training and practicing to hit my target, and using a more effective load. For one thing, I don't like the idea of having to count shots in a stressful situation, to know what I am putting on my target. I much prefer having #00 and slugs on-hand for manual load, if escalation from my preferred load is required.