Turo

07-26-2010, 1:01 PM

Let me preface this by saying, "Skipping bullets off water can be dangerous. In fact in most every case it's extremely dangerous and should not be attempted by anyone not in a controlled laboratory setting."

Now that that's out of the way, I'm interested if anyone has any info on this phenomenon. I found some info about how a projectile can ricochet off of water, but it's about a non-spinning projectile.

The equation was for the critical angle at which a non-spinning projectile would ricochet off of water. Incident Angle=18/(D^.5). Where the angle is measured in degrees from the surface of the water, and D is the specific gravity of the projectile (how many times more dense than water it is.)

Now, calculating using a lead bullet, I've figured that the approximate max angle a bullet should ricochet off of water to be about 5.4 degrees. (This is approximate because the bullet may not be 100% pure lead, and of course it has an axial spin imparted onto it by the rifling)

From anecdotal evidence I've heard about skipping .223 and .308 where the shooter would lie prone on the bank of a lake and would aim out about 100 yards and it would be possible to see the splash(es) of it bouncing off the water 300-500 yards out. Of course this was all anecdotal, but I'm pretty sure it can (and does) happen.

Now, obviously this can be extremely dangerous to attempt, but do any of you guys have stories of actually doing this? And I know it may be asking a lot, but are there any approximate distances included that you'd like to share?

And please, I know this is dangerous, I don't need a bunch of yahoos posting how bad it is or how I'm going to jail for talking about it. If you don't have something positive or constructive to add, please keep it to yourself.

EDIT: I know my avatar looks like I'm shooting over water, I'm not. It was a posed photograph with the canal as a purposeful background.

Now that that's out of the way, I'm interested if anyone has any info on this phenomenon. I found some info about how a projectile can ricochet off of water, but it's about a non-spinning projectile.

The equation was for the critical angle at which a non-spinning projectile would ricochet off of water. Incident Angle=18/(D^.5). Where the angle is measured in degrees from the surface of the water, and D is the specific gravity of the projectile (how many times more dense than water it is.)

Now, calculating using a lead bullet, I've figured that the approximate max angle a bullet should ricochet off of water to be about 5.4 degrees. (This is approximate because the bullet may not be 100% pure lead, and of course it has an axial spin imparted onto it by the rifling)

From anecdotal evidence I've heard about skipping .223 and .308 where the shooter would lie prone on the bank of a lake and would aim out about 100 yards and it would be possible to see the splash(es) of it bouncing off the water 300-500 yards out. Of course this was all anecdotal, but I'm pretty sure it can (and does) happen.

Now, obviously this can be extremely dangerous to attempt, but do any of you guys have stories of actually doing this? And I know it may be asking a lot, but are there any approximate distances included that you'd like to share?

And please, I know this is dangerous, I don't need a bunch of yahoos posting how bad it is or how I'm going to jail for talking about it. If you don't have something positive or constructive to add, please keep it to yourself.

EDIT: I know my avatar looks like I'm shooting over water, I'm not. It was a posed photograph with the canal as a purposeful background.