fish2xs
Member
Couple weeks ago I was at the range and firing .308 surplus ball ammo at two plastic
bottles, both filled with water and sealed tight. Targets were 150 yards away. One bottle
was 2 liter the other was smaller (don't recall the exact size, but it was a bit smaller than
a 12oz beer bottle).
Both targets when hit the first time, fell on their sides. Other than falling, there was no
perceivable change I could see. The second shot that hit them caused each bottle
to explode massively.
....Why? I would expect the first shot to have caused the explosion. With openings in
the bottle and less water, I assumed pressure would have escaped without blasting
the bottles into smitherines.
Other factors:
outside temp was about 30 degrees F
bottles were filled almost to capacity - no ice
bottles were placed on the side of a dirt backstop
I don't know how much water leaked out before the second hit
...note I'm assuming that both bottles were only hit once prior to the devastating impact,
and that the first couple shots probably missed. Post contact autopsy of the remaining
2L plastic fragments indicated only one other hit, but it was starting to snow/rain/blow so I
didn't bother with re-assembly. the smaller bottle was just plain gone....
bottles, both filled with water and sealed tight. Targets were 150 yards away. One bottle
was 2 liter the other was smaller (don't recall the exact size, but it was a bit smaller than
a 12oz beer bottle).
Both targets when hit the first time, fell on their sides. Other than falling, there was no
perceivable change I could see. The second shot that hit them caused each bottle
to explode massively.
....Why? I would expect the first shot to have caused the explosion. With openings in
the bottle and less water, I assumed pressure would have escaped without blasting
the bottles into smitherines.
Other factors:
outside temp was about 30 degrees F
bottles were filled almost to capacity - no ice
bottles were placed on the side of a dirt backstop
I don't know how much water leaked out before the second hit
...note I'm assuming that both bottles were only hit once prior to the devastating impact,
and that the first couple shots probably missed. Post contact autopsy of the remaining
2L plastic fragments indicated only one other hit, but it was starting to snow/rain/blow so I
didn't bother with re-assembly. the smaller bottle was just plain gone....