It might not be an 'element' of the section however it would be relevant in the case. If, from an objective view, the fear is completely irrational then it would be chucked out. Unless the defendant has shown a serious case of gross negligence then this type of charge wouldn't be pursued.
Also the distance would relate directly to the reason for the shooting in my opinion, one shot shooting a sick cow is different to 100s of rounds shooting clays.
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