I have found the 155 and 165 gr bullets to be most accurate in .40. I think you will find some others who agree. Good luck, finding anything in those weights. I can't think of any manufacturers who produce the lighter gr bullets in factory ammo. I reload all of mine and I personally won't shoot 180's.
The .40 I will pick up Sunday is the CZ 75, which has a lot of weight to it and I hope the weight will help reduce the "snap".