I remember one fight that I lost M8 vs Ostwind.
First I came across an M3 that despawned just after I saw it, giving me a proximity kill.
I continued over a small hill towards the location the M3 had been. This proved to be the spawn point though I did not know that at the time.
As I came down the hill an Ostwind spawned and I proceeded to shoot him, targeting the turret and hitting it with five of my six shots, all from less than 100 yards. Now, if an M8 hits a Panzer IV H's turret in the rear from that range the turret is destroyed. The Ostwind in this case got got oriented and proceeded to blow me apart with his automatic 37mm cannon.
I then, being frusterated at having the thin Ostwind turret armor apparently keep my 37mm AP rounds out, said on the open channel (this was in beta) that it was BS.
It developed that what had really happened was that the M3 that had despawned had not despawned due to my M8 at all. It had despawned because it had finished dropping all of the Vehicle Supplies that it was carrying. The driver never even saw my M8. When he respawned in the Ostwind he was sitting on the Vehicle Supplies and when each of my shots took out his turret, his turret was instantly repaired.
My M8 was fighting a nearly impossible fight.