I'm a 410 nut...and I've shot these. They're not great, and they lose velocity fairly fast. They also seemed to spread really quickly, even from a full choke

Would surely do nicely for up close groundhogs (20yds and in) and also home defense.

If I loaded my Rem1100 .410 with 5 of these, I sure as hell wouldn't want to be on the other end at 5yds...LOL