rain
What are your thoughts about target shooting in the rain? Will rain effect a bullets flight? How bout drizzle? It wont stop me from hunting but when developing loads, I wont shoot in a light rain or drizzle.
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what does rain have to do with anything. The NRA outdoor matches are held in torrential down pours all summer long. 0 -
Odds are excellent that the bullet won't even hit a drop of rain; and if it does, the pressure wave in front of it is likely going to displace it or boil it away; and even if it does hit, at anything less than a thousand yards you are unlikely to see an issue. Even then it won't be major.
As bpost said, I've seen matches held in downpours so bad that it ruined supposedly water proof scopes, disintegrated targets, and flooded groundhogs out of their holes, but a good shooter who can ignore such things still scored a lot of bullseyes... so I wouldn't worry about it for hunting purposes.0 -
"what does rain got to do with it?" How do I know? Im not an NRA match shooter, thats why Im asking. 0 -
I have shot some of my best groups ever in slow, steady, windless drizzles. Maybe the elevation is slightly different, but temperature, humidity & atmospheric pressure affect point of aim, too. 0 -
quote:Originally posted by willie332
What are your thoughts about target shooting in the rain? Will rain effect a bullets flight? How bout drizzle? It wont stop me from hunting but when developing loads, I wont shoot in a light rain or drizzle.
Rain, in and of itself, will NOT effect your bullets' performance...Other atmospheric conditions (humidity, wind, altitude, etc) will/may0 -
Well you got some good answers here.
But now lets talk about horizontal deflection caused by the Coriolis effect of the rotation of the earth.[:0][:D]0 -
The humidity(moisture in the air) in the air causes drag on the bullet. This is at long distances that we see the most effect.
Why wouldn't rain cause drag on a bullet as well? If it's raining hard enough, wouldn't it be like shooting through multiple thin walls of water? Wouldn't it slow the FPS some?0 -
Wow! 0 -
I would like to see one of those ultra-slow motion videos of someone shooting through rain and the POI changes that result from it. 0 -
Hey sky soldier, here is some 5th grade math for you, from another shooting website[:D]
"""Rain makes up 0.2% of air volume during a 2-inches-of-rain-per-hour storm. (With 0.016 gallons of water falling through a cubic foot {7.5 gallons} of air per second.) It makes up far less than that during normal rain storms.
You have a 1:500 chance of hitting water in a one cubic foot air space (2"/hour) during a 1 second time interval.
Remember - The human brain makes us see things that are not necessarily real. It may look like a wall of water, but it's a bunch of individual rain drops. The streaking is a processing effect, done by our brains, so we have time to "see" the rain - rather than the brain only acknowledging it subconsciously.
To look at the odds of hitting water, let's look at only the bullet's path.
Imagine the bullet will travel through a "cylinder" of air.
With a .308" bullet, we need to find out how long this cylinder will be, to have a volume of one cubic foot.
1 Cubic Foot = 1,728 Cubic Inches
The volume of a cylinder is calculated as:
Pi*radius^2 (of circle)*length (of cylinder)
The radius of a .308" bullet is .154".
Pi(3.141)*.154^2 = 0.234 square inches.
1,728 cubic inches / 0.234 sq in = 7,382.5 inches
So, a .308" diameter cylinder needs to be 7,382.5 inches long to contain one cubic foot of volume. (7,382.5 inches / 12 inches per foot = 615.2 feet)
Which means.... your .308" bullet can travel 615 feet or 205 yards with a 1:500 chance of hitting water. Move closer to the target, at 100 yards; and you have a 1:1025 (0.0975%) chance of hitting water.
If it's only raining 1"/hour ... those odds go to 1:2050 (0.0488%) at 100 yards.
And that's not even figuring the adjustment for bullet flight time. Most bullets won't take a full second to reach the target. Therefore, they won't have a full second's worth of exposure, and the odds of hitting water are decreased even further.
For example (simple calculation with constant velocity):
A 2,100 fps bullet will reach a 100 yard target in 1/7 of a second (2,100 feet per second/300 feet = 1/7 second).
That means the odds of hitting water drop to a 1:7175 (0.0139%) chance of hitting water.""
You're welcome.0 -
quote:Originally posted by babun
Hey sky soldier, here is some 5th grade math for you, from another shooting website[:D]
"""Rain makes up 0.2% of air volume during a 2-inches-of-rain-per-hour storm. (With 0.016 gallons of water falling through a cubic foot {7.5 gallons} of air per second.) It makes up far less than that during normal rain storms.
You have a 1:500 chance of hitting water in a one cubic foot air space (2"/hour) during a 1 second time interval.
Remember - The human brain makes us see things that are not necessarily real. It may look like a wall of water, but it's a bunch of individual rain drops. The streaking is a processing effect, done by our brains, so we have time to "see" the rain - rather than the brain only acknowledging it subconsciously.
To look at the odds of hitting water, let's look at only the bullet's path.
Imagine the bullet will travel through a "cylinder" of air.
With a .308" bullet, we need to find out how long this cylinder will be, to have a volume of one cubic foot.
1 Cubic Foot = 1,728 Cubic Inches
The volume of a cylinder is calculated as:
Pi*radius^2 (of circle)*length (of cylinder)
The radius of a .308" bullet is .154".
Pi(3.141)*.154^2 = 0.234 square inches.
1,728 cubic inches / 0.234 sq in = 7,382.5 inches
So, a .308" diameter cylinder needs to be 7,382.5 inches long to contain one cubic foot of volume. (7,382.5 inches / 12 inches per foot = 615.2 feet)
Which means.... your .308" bullet can travel 615 feet or 205 yards with a 1:500 chance of hitting water. Move closer to the target, at 100 yards; and you have a 1:1025 (0.0975%) chance of hitting water.
If it's only raining 1"/hour ... those odds go to 1:2050 (0.0488%) at 100 yards.
And that's not even figuring the adjustment for bullet flight time. Most bullets won't take a full second to reach the target. Therefore, they won't have a full second's worth of exposure, and the odds of hitting water are decreased even further.
For example (simple calculation with constant velocity):
A 2,100 fps bullet will reach a 100 yard target in 1/7 of a second (2,100 feet per second/300 feet = 1/7 second).
That means the odds of hitting water drop to a 1:7175 (0.0139%) chance of hitting water.""
You're welcome.
I think that the cubic volume of the .308" diameter projectile is actually (Pi*Rsquared).0745 sq. in., so the odds of hitting a raindrop are even less than shown.
Conversely, the bullet could hit a raindrop 12" from the muzzle... we just don't know.0 -
quote:Originally posted by MG1890
quote:Originally posted by babun
Hey sky soldier, here is some 5th grade math for you, from another shooting website[:D]
"""Rain makes up 0.2% of air volume during a 2-inches-of-rain-per-hour storm. (With 0.016 gallons of water falling through a cubic foot {7.5 gallons} of air per second.) It makes up far less than that during normal rain storms.
You have a 1:500 chance of hitting water in a one cubic foot air space (2"/hour) during a 1 second time interval.
Remember - The human brain makes us see things that are not necessarily real. It may look like a wall of water, but it's a bunch of individual rain drops. The streaking is a processing effect, done by our brains, so we have time to "see" the rain - rather than the brain only acknowledging it subconsciously.
To look at the odds of hitting water, let's look at only the bullet's path.
Imagine the bullet will travel through a "cylinder" of air.
With a .308" bullet, we need to find out how long this cylinder will be, to have a volume of one cubic foot.
1 Cubic Foot = 1,728 Cubic Inches
The volume of a cylinder is calculated as:
Pi*radius^2 (of circle)*length (of cylinder)
The radius of a .308" bullet is .154".
Pi(3.141)*.154^2 = 0.234 square inches.
1,728 cubic inches / 0.234 sq in = 7,382.5 inches
So, a .308" diameter cylinder needs to be 7,382.5 inches long to contain one cubic foot of volume. (7,382.5 inches / 12 inches per foot = 615.2 feet)
Which means.... your .308" bullet can travel 615 feet or 205 yards with a 1:500 chance of hitting water. Move closer to the target, at 100 yards; and you have a 1:1025 (0.0975%) chance of hitting water.
If it's only raining 1"/hour ... those odds go to 1:2050 (0.0488%) at 100 yards.
And that's not even figuring the adjustment for bullet flight time. Most bullets won't take a full second to reach the target. Therefore, they won't have a full second's worth of exposure, and the odds of hitting water are decreased even further.
For example (simple calculation with constant velocity):
A 2,100 fps bullet will reach a 100 yard target in 1/7 of a second (2,100 feet per second/300 feet = 1/7 second).
That means the odds of hitting water drop to a 1:7175 (0.0139%) chance of hitting water.""
You're welcome.
I think that the cubic volume of the .308" diameter projectile is actually (Pi*Rsquared).0745 sq. in., so the odds of hitting a raindrop are even less than shown.
Conversely, the bullet could hit a raindrop 12" from the muzzle... we just don't know.
AND.....
your calculation(s) also do not (most likely CANNOT)take into account the effect the moving bullet has in Parting the air (and the water/moisture)in front of it as it travels........0 -
Wow! 0 -
Ok guys, play nice-[:)]
I will add, I love seeing the bullet leave from my 22-250 on super humid days and seeing that vapor trail.[:D]0 -
I have shot in the rain and my performance is degraded more than the bullet's.
I have watched skeet shooters in the rain and seen a cone of fog reaching from muzzle to and beyond the target. I don't know if that is FrancF's vapor trail or those 400+ pellets actually smashing into raindrops, but it is an impressive sight. Like a ray gun.0 -
quote:Originally posted by FrancF
Ok guys, play nice-[:)]
I will add, I love seeing the bullet leave from my 22-250 on super humid days and seeing that vapor trail.[:D]
I wholeheartedly concur!0 -
Depends on where the rain drops are at when you pull the trigger.[:D] 0 -
IMO rain effects the shooter far more than the projectile.
I finished one an 800Yd portion of a palma match in a sudden downpour, It didn't change my point of impact but it irratated my grumpy score keeper!(Because I kept his whiney but out in the rain so I could finish!WAAAH WAAAH We both lived throuth it.)0 -
It's like babun say's Even though we see the rain, it is actually very minimal in size. Over the course of a 100-300 yd. shot there just isn't enough volume of water to really hit.
Also, along with the minimal encounter of each raindrop, there is a pressure wave in front of the bullet as it moves through the air. That pressure has a lot of effect on raindrops of minimal volume and nothing solid to back them up. When I've shot in the rain, I've heard the bullet moving through the rain. Almost like a buzz. Yet the bullets were dead on. I actually went and tested this after arguing on another forum that the bullets were hitting the raindrops. Somebody there explained it to me and I didn't believe it. Until I set up and actually watched it. Something too about the humidity. High humidity actually give better ballistic performance. I know it sounds backwards but the air has to be thin to allow humidity. That's why we get clouds in a low pressure situation. The effect is minimal but noticeable.0 -
I have shot many Benchrest matches in the rain (and snow) and I'm here to tell you that a bullet can hit a raindrop or snowflake, and when it does you may as well kiss that aggregate goodbye. It does not happen very often but when it does there is no denying it.
The same can be said of flying insects.
If you are a golfer, it's said that a tree is 50% air and 50% limbs and leaves. But, just try making a critical shot through a tree rather than over or around it. You'll be punished a lot more than 50% of the time.[B)]
JMHO
Ray0
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