I shoot broadheads for practice all year around, and always have a few dedicated just for this.
I abuse them hard, trying to see what works, where failures happen, and what it takes to get them sharp again (out of my 80# HSS Longbow).
Three dedicated VPA's were used for several thousand shots: sand banks, ethafoam broadhead targets, and yes-stumpshooting.
They were ploughed into rocks and i had to use a hammer and chisel to dig them out of treated posts and stumps. The only failure i had was when an insert in a footed carbon shaft finally failed, shifted on impact, and the threaded portion on the VPA broke off.
For a guy like me VPA's are a bargain. They are what do the killing when they hit an animal, and i want to know that they will do the job as long as i do mine.