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Distance above line of sight

SheepDog

I am wondering how far above the line of sight a good 1000 yard target bullet will travel.
I am thinking it must be over 7 feet above the line of sight on its way to a 1000 yard zero.
Is that about right?
I am considering the design parameters for a 1000 yard underground range. Just an exercise because I don't have the finances to build it at this time.
 
Lol, now that's a question! Don't have any answers but it may only need to be tall where it needs to be. Keeping the budget down ya know. I'd like to hear how much this might cost.
 
SheepDog said:
I am wondering how far above the line of sight a good 1000 yard target bullet will travel.
I am thinking it must be over 7 feet above the line of sight on its way to a 1000 yard zero.
Is that about right?
I am considering the design parameters for a 1000 yard underground range. Just an exercise because I don't have the finances to build it at this time.
Click to expand...
More like 3 times what you think Larry
 
Fast velocity with high BC bullets, 7' above line of sight would be about as flat as you will see. From more normal speeds with high BC bullets, say 8 to 12' above. With slower speeds, say up to 15', and from lower BC bullets more then that yet. Would think one would want at least a 25' ceiling to allow for the height of benches and the trajectory path above them, for the normally used rifles and bullets.
Donovan

Edit:
Below is trajectory for a .450-G1BC bullet at 2500-fps (1325'/60-F/29.92"/2"-sc):

Trajectory5.png
 
Last edited:
So you think a 20 foot floor to ceiling height would be adequate for most serious 1000 yard shooting?

With a 3' bench, 1 foot above that for support of the rifle, and 16 feet for bullet rise. I must say that sounds excessive but then I don't typically shoot at ranges even close to that.
I am thinking 5 feet wide for a lane and it will probably need some sound absorption and baffles to absorb the blast from brakes. I would want automatic target placement and retrieval (with settings from 10 feet to 1000 yards by selection near the shooting station. Am I forgetting anything?
 
SheepDog said:
So you think a 20 foot floor to ceiling height would be adequate for most serious 1000 yard shooting?

With a 3' bench, 1 foot above that for support of the rifle, and 16 feet for bullet rise. I must say that sounds excessive but then I don't typically shoot at ranges even close to that.
I am thinking 5 feet wide for a lane and it will probably need some sound absorption and baffles to absorb the blast from brakes. I would want automatic target placement and retrieval (with settings from 10 feet to 1000 yards by selection near the shooting station. Am I forgetting anything?
Click to expand...

Yeah, you forgot you'll need to win the Powerball.:D:D:D
 
SheepDog said:
So you think a 20 foot floor to ceiling height would be adequate for most serious 1000 yard shooting?

With a 3' bench, 1 foot above that for support of the rifle, and 16 feet for bullet rise. I must say that sounds excessive but then I don't typically shoot at ranges even close to that.
I am thinking 5 feet wide for a lane and it will probably need some sound absorption and baffles to absorb the blast from brakes. I would want automatic target placement and retrieval (with settings from 10 feet to 1000 yards by selection near the shooting station. Am I forgetting anything?
Click to expand...


Coriolis Effect??
 
SheepDog said:
So you think a 20 foot floor to ceiling height would be adequate for most serious 1000 yard shooting?

With a 3' bench, 1 foot above that for support of the rifle, and 16 feet for bullet rise. I must say that sounds excessive but then I don't typically shoot at ranges even close to that.
I am thinking 5 feet wide for a lane and it will probably need some sound absorption and baffles to absorb the blast from brakes. I would want automatic target placement and retrieval (with settings from 10 feet to 1000 yards by selection near the shooting station. Am I forgetting anything?
Click to expand...
I think to be safe you would need 25' above the bore or line of site and ventilation that Change the bullet path A perfect vacuum would be the ultimate . lol Larry
 
The big set back to a 1000yd tunnel is the 1-1/2 quarters of land needed to have enough distance for such a project. In my "neck of the woods", it would cost at least $1-million for the land/property alone.
Just saying.... but it is a "lottery dream" of mine as well... lol
Donovan
 
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Depends what your shooting..... big deal too.. 308 vs 6.5x284 vs 284 is all different.

7ft isnt enough.. maybe 21ft..

338 lapua at a mile goes 32 or 42ft up above line of sight cant remember now..
 
The Coriolis effect will have to be determined with the direction the tunnel is laid out. It will only play a role in setting the zero and at that point the overall rise should be the same. The horizontal effects will have to be considered for the tunnel width depending on the north/south orientation.

I will have to have fresh air ventilation to keep the combustion by-products away from the shooter but I think that can be done in a way that does little to modify the bullet path.

A 25 foot ceiling height would require a trench that was 40 feet deep after leveling the site. I'll have to look at that before I make a decision on it.

Yes, I will have to win the PowerBall lottery to do everything I would like to do but until then I can dream and put it on paper and go through the improvements so that when I do win the big one I can do it right the first time! :)
 
dkhunt,
Above ground you could have a road (primitive) out to the target stands. It would have to be leveled and a 25 foot berm behind the target stand but there would be no need to enclose it. Just build a three sided shelter with a roof for the shooting position and open fire. It would be considerably more expensive to build a public range with getting the permits and meeting codes for whatever the county demanded but a private range doesn't have to deal with all that crap.
 
If I drilled a 3000' hole in the ground I would likely hit water - HOT water long before I got that far. :)
A local guy put in a well for potable water and uses it to heat his home and has to cool it for drinking.
 
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