-Mounted on a standard mounts (rings) almost any scope will "die" after 40 - 50 pellets, with this airgun (>20 Joules). The reticle will either lose it's adjustability or it will fall off (inside the tube). The use of a "zero recoil" mount (such as the Diana ZR) is a must in this case. -The trouble with your advice on removing the cap and setting it as to refer to "zero" position is: you DO NOT KNOW which direction the turret was turned when (accidentally or not) someone revolved it. If it was moved clockwise, and you turn clockwise to regain your "zero", it will make things even worse.
Currently 0.177 only available in India due to amendment in act. Do u have any information on the energy of Diana 460. Do they reduced it for India??? as the original max is 27 J and allowed in India is 20 J. Could u please comment on this.