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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Shooting in the Rain?
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<blockquote data-quote="beezaur" data-source="post: 87241" data-attributes="member: 4606"><p>[ QUOTE ]</p><p>Physics is physics- . . .</p><p></p><p>[/ QUOTE ]</p><p></p><p>Sorry, I was trying to agree with what you posted earlier. I didn't mean to sound like it was my idea or that I was contesting. You said "scrutinize" so. . .</p><p></p><p>Anyway, a main aspect to me is the low probability of actually hitting a drop. With the 1000-yard target and 1"/hr heavy rain you only have something on the order of a 1.5% chance of hitting even one drop. In a more realistic rain at a range that is, well, more my speed /ubbthreads/images/graemlins/smile.gif , you have more like 0.25% chance -- statistically you'd have to shoot 400 shots at 500 or so yards to have one droplet impact. And half of those would be downrange where it matters least.</p><p></p><p>At the risk of seeming like an *** for saying this, the more I think about this problem, the less I think shooting experience has to do with the effects of an impact. If shooting exerience shows that rain is not a problem ballistically, what does that mean? It might mean only that the bullet is not likely to impact a drop. That doesn't tell you anything about what happens when it does hit a drop.</p><p></p><p>For practical purposes it doesn't matter beyond that. You shoot without correction in the rain and that's the end of it, because you don't have to care what happens when a collision occurs.</p><p></p><p>I'm still curious though, and I think I made a mistake above by not accounting for the water's final velocity as it is bounced off the bullet. I keep getting large deflections on the order of a few meters per second sideways. And the energy from vaporization is surprizingly large -- 44 kJ/mol, or 20 J (14 ft-lbs) for that 0.008 gram drop. Those effects seem excessive to me.</p><p></p><p>Scott</p></blockquote><p></p>
[QUOTE="beezaur, post: 87241, member: 4606"] [ QUOTE ] Physics is physics- . . . [/ QUOTE ] Sorry, I was trying to agree with what you posted earlier. I didn't mean to sound like it was my idea or that I was contesting. You said "scrutinize" so. . . Anyway, a main aspect to me is the low probability of actually hitting a drop. With the 1000-yard target and 1"/hr heavy rain you only have something on the order of a 1.5% chance of hitting even one drop. In a more realistic rain at a range that is, well, more my speed [img]/ubbthreads/images/graemlins/smile.gif[/img] , you have more like 0.25% chance -- statistically you'd have to shoot 400 shots at 500 or so yards to have one droplet impact. And half of those would be downrange where it matters least. At the risk of seeming like an *** for saying this, the more I think about this problem, the less I think shooting experience has to do with the effects of an impact. If shooting exerience shows that rain is not a problem ballistically, what does that mean? It might mean only that the bullet is not likely to impact a drop. That doesn't tell you anything about what happens when it does hit a drop. For practical purposes it doesn't matter beyond that. You shoot without correction in the rain and that's the end of it, because you don't have to care what happens when a collision occurs. I'm still curious though, and I think I made a mistake above by not accounting for the water's final velocity as it is bounced off the bullet. I keep getting large deflections on the order of a few meters per second sideways. And the energy from vaporization is surprizingly large -- 44 kJ/mol, or 20 J (14 ft-lbs) for that 0.008 gram drop. Those effects seem excessive to me. Scott [/QUOTE]
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Shooting in the Rain?
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