I'm sure we all agree that two people shooting the same load at the same type of animal can get different results. Again, I'm not trying to start, or perpetuate, a pizzing match.
Please don't take any of my posts the wrong way. I'm a big fan of VMax, they devastate PDs out of my .223 and I started with 17gr VMax (Federal Premium) when I first got my 17. I used it on three groundhogs (50-70 yards). Two were high center-mass (standing targets) and one was a head shot. None of the three seemed to be the lightning quick kill I was expecting, that’s why I looked at the XTPs for fox.
This is just my experience, I’m not saying that it should, or will, be anyone else’s experience.