The Accubombs were recovered well before the offside on broadside shots on smallish deer at extended range. Given the range and the fact they hit about where they should have it indicates no problems like reloading error or anything beyond poor penetration.
If that TTSX was pushed at reasonable speed it would either pass through or upset and be stopped. Failure to open would normally be associated with "excess" penetration...
Considering the fact I saw 4 Accubombs in a row fail to penetrate from three different rifles leaves me with zero faith in them for penetrating. They would be fine for deer bullets, but I would not use them for anything of size or heft...
The fact Brad has a failure does not surprise me. With no way to investigate the failure all we can deduce is something happened to prevent the bullet from reaching appropriate speed...
