Looks like the OP has moved on from this topic. I see he has posted in other threads since this one.
At this point we might be discussing an issue that he may have already resolved.
Mine did the same thing. Used 147g after that, worked better. Still sold it.
Meh, the only HK I'd buy is HK Produkt. Known here as "Springfield" XD/M series handguns. It'll eat everything, including Glocks breakfast.