Amazing what one finds on the web:
Here we find the following:
"Firing handguns into the air is commonplace in some parts of the world and causes injuries with a disproportionate number of fatalities. For a typical modern 7.62 millimetre calibre bullet fired vertically from a rifle, the bullet will have a velocity of about 840 metres per second as it leaves the muzzle and will reach a height of about 2400 metres in some 17 seconds. It will then take another 40 seconds or so to return to the ground, usually at a relatively low speed which approximates to the terminal velocity. This part of the bullet's trajectory will normally be flown base first since the bullet is actually more stable in rearward than in forward flight.
Even with a truly vertical launch, the bullet can move some distance sideways. It will spend about 8 seconds at between 2300 and 2400 metres and at a vertical velocity of less than 40 metres per second. In this time it is particularly susceptible to lateral movement by the wind. It will return to the ground at a speed of some 70 metres per second. This sounds quite low but, because of the predominance of cranial injuries, the proportion of deaths and serious injury as a proportion of the number of gunshot wounds is surprisingly high. It is typically some five times more than is observed in normal firing."
So it looks like firing directly up is not a risk-free occupation.
Here we find the following:
"Firing handguns into the air is commonplace in some parts of the world and causes injuries with a disproportionate number of fatalities. For a typical modern 7.62 millimetre calibre bullet fired vertically from a rifle, the bullet will have a velocity of about 840 metres per second as it leaves the muzzle and will reach a height of about 2400 metres in some 17 seconds. It will then take another 40 seconds or so to return to the ground, usually at a relatively low speed which approximates to the terminal velocity. This part of the bullet's trajectory will normally be flown base first since the bullet is actually more stable in rearward than in forward flight.
Even with a truly vertical launch, the bullet can move some distance sideways. It will spend about 8 seconds at between 2300 and 2400 metres and at a vertical velocity of less than 40 metres per second. In this time it is particularly susceptible to lateral movement by the wind. It will return to the ground at a speed of some 70 metres per second. This sounds quite low but, because of the predominance of cranial injuries, the proportion of deaths and serious injury as a proportion of the number of gunshot wounds is surprisingly high. It is typically some five times more than is observed in normal firing."
So it looks like firing directly up is not a risk-free occupation.
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