Those Pb1 rockets are devastating against armored gv's (the best [and only] anti-tank rocket in AH. The British 60lb rockets are SAP = "semi" AP), but they are tied with the Soviet RS-82 for weakest rocket vs OBJ. Here are a few things to remember when using them:
1. There is no convergence, they fire straight off the wing. So your reticule is NOT where they are going hit, ever. They will hit either side of where you aim the width of the wing mounting points, compare that size to the length of a tank. So, it is best to come in from the broad side and your human error will hopefully land a hit somewhere. Obviously, a stationary target is best. Put the reticule dead on your target and go for an "area effect" target. Again, your human error will actually help you.
2. The 190's have a horrible stall characteristic when trying to pull out of a steep dive at anything but high speeds. So with that in mind, keep your speeds up (250+TAS), your attack angle 45 degrees or less, and think just as much about your egress out as your attack route in.
3. Patience is virtue. Take your time and do not rush. The Germans figured 1 in 6 rockets hit the mark, and they usually fired them in 6 or 12 rocket volleys. I suggest 3-4 rockets per volley.