Catastrophic on groundhogs too. I have mine real close to the lands, and they're long to the ogive anyway. The recoil boogered up the tips of the 2nd and 3rd shot in the magazine. The Noslers have a similar BC, and the tip is pretty tough. My 1:10 twist didn't do well with the lighter bullets, but the 155-180 range worked really well.
Good shootin'!
Rudy