Are those broadheads in which the blades remain hidden and stuck to the body of the broadhead and only open at the time of impact with the animal. The mechanical broadheads are those that have advanced the most in recent years and the type of broadhead that is increasingly attracting more followers in recent times. Your flight is perfect because during the flight your blades remain closed. In this way, we get them to fly exactly like the training broadheads even at the great speeds of the modern arcs and with the current short booms. They can be designed with large cutting diameters without fear that this length of the blades affects the flight.
A larger cutting diameter produces larger wounds, this increases the lethality of the hunting broadhead considerably. In return, their blades are more fragile, the sharpening and possibility of reuse of the broadhead is more complicated, they depend on a mechanical opening system that can fail, they can produce impact errors in very cracked shots by sliding on the skin tearing without reaching to penetrate and also spend energy in the effort of having to deploy the blades so they are not suitable for those who pull with low powers with which all the energy accumulated in the arrow must be used to obtain greater penetration. There really is no ideal broadhead type.
Each type of hunting and animal requires a type and a broadhead weight. The choice is linked to the power and type of bow used and the peculiarities of the animal that is to be hunted. It does not need the same power of penetration, to hunt a roe deer that has a relatively small body and a very soft skin, that to hunt a large boar that besides its hard skin can protect its vital zone with a hard shield of mud. Also, mention that there are other broadheads for hunting on the fly and small game of species such as the rabbit or small birds.