You may have to be a bit creative with the dropping of weapons,if you don`t have spare dummies to cover all the envelope conditions.Suggestions anyway; low speed/hover- use a couple of those large `collapsing airbags` covered in cardboard/nets that `Bollywood` stuntmen jump off buildings into,or a large pit full of polystyrene/netted.
forward flight- suggest you use a suitable parachute with static-line for recovery......make sure any flailing static line is not long enough to go into tail rotor,driveshafts,rotor or engine !!!
If possible,drops should be done over an area of soft sand as well.
I think your `worst` envelope conditions would probably be,high-speed in a turn,high-speed autorotation and low speed auto,max weight conditions.
I would explore any `asymmetric` drops( with sideslip/skid) very cautiously....Syc..
High-speed cameras,on aircraft and ground ..a must !