Bought a Defender 1300 in '99 and have never regretted it.
It's had a total of 75 rounds through it, mostly #4, but it's had 15 of #00, 10 rounds of #000 buck, 10 rounds of #4 buck, 10 rounds of rifled slug (2 3/4 and 3").
For home defense, first round up is #4. The rest are the double-oughts.