So, I just swapped around some specializations on the Churchill Heavy tank, as the 95mm howitzer just didn't have the range I wanted, even if it was potent.
When I looked at my other options, I didn't see the point in matienence drills or the incendiary launcher, so chose improved loading, which meant I had to pick improved traverse, then, avoiding the howitzer this time, I got reinforced turret, and finally chose APC over Snakebite, as a weapon you can only fire forwards on the a tank with a turret, and only in CQC, didn't sound very good.
Then I was able to fire 6 shots to down a Tiger heavy in 4 seconds, at least that's what I felt like. Jeez, is this an autocannon or something? I love it!