Let me tell you more:
Alchemer not breaking plants: This only applies for normal attacks. Charge attacks can break them but normal attacks can't. I also found that my 2* Firotech Alchemer could break them while my 4* Shadow Driver couldn't. Is this a bug or intended because my blaster and magnus can break plants as well. So you don't get confused, these are the plants on the ground not the bushes.
Blackhawk range problem: I found that my Blackhawk has less range than all the other Antigua line guns, even Silversix. Again, is this a bug or intended?
If you can reply, that would be very nice.
I'm not sure about blackhawk, but for your information, it appears that 4* drivers onward (not sure about MK II ones), the normal shots they fire appear to travel further than they actually do server side. Try moving closer towards the bushes about 2 squares, it should break I think?