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Thread: Indoor range

  1. #1
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    Indoor range

    Question for those with a scientific mind. Could probably find on the net but probably quicker here. A friend is looking at building an indoor range off a 100yrds to mitigate noise. He has out door ranges already. We've looked at concrete pipes and ppe etc but very expensive. also containers end to end but transport kills them. My question is that when a bullet breaks the sound barrier how long/far does that shock wave of noise travel? In other words could you say maybe use two or three containers as baffles with baffles inside like a giant suppressor with a small opening on the last. Would that contain the sonic boom and the bullet could then travel on happily to the target with little more than a muffled sound? Or would you have to have it contained all the way? We can bury containers or what we use to make that side of it very sound proof.
    Interested in what you guys think or have done

  2. #2
    Member 40mm's Avatar
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    Sounds like fun.

    If you shoot from a container etc, with a small opening that the bullet exits from and onto the distant target... Remember your field of vision will be extremely small and there will always be a risk of someone walking in front of that opening at the wrong time.
    A six foot electric fence with lots of warning signage and a range flag might help with that. MAybe a moat, and some crocodiles too.

    I have had a similar idea for a while, but cost is the problem.
    257weatherby likes this.
    Use enough gun

  3. #3
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    Supersonic projectiles will be making noise until they go trans-sonic. For .22lr that's 125yards or so. 223 about 850y and 308 1000y.

    Concrete pipes are horrible to shoot through. Even closed in containers (You're looking at 8 of them end-on-end) Will throw heaps of noise back at you.

    A trench/valley with lots of dense shrubs planted along the ridges would be the best for soaking up/dispersing noise, but it's still there.
    Diligentia Vis Celeritas
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  4. #4
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    It's private property with no access easily for the public. He did try one container once and it worked ok but still not enough to get below the noise level required. Yes he has one of "those neighbors" Mimms how much noise are we talking? obviously most noise is the breaking of the sound barrier but what sort of noise does this reduce to?

  5. #5
    Member Pengy's Avatar
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    Quote Originally Posted by r87mm View Post
    It's private property with no access easily for the public. He did try one container once and it worked ok but still not enough to get below the noise level required. Yes he has one of "those neighbors" Mimms how much noise are we talking? obviously most noise is the breaking of the sound barrier but what sort of noise does this reduce to?
    Given where you live, I would suggest you go and have a chat to the guys at Kelly country and find out how they got it done
    mikee likes this.
    Forgotmaboltagain+1

  6. #6
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    Quote Originally Posted by r87mm View Post
    It's private property with no access easily for the public. He did try one container once and it worked ok but still not enough to get below the noise level required. Yes he has one of "those neighbors" Mimms how much noise are we talking? obviously most noise is the breaking of the sound barrier but what sort of noise does this reduce to?
    Depends on zoning. If rural then "agricultural impact noise" levels are high and as long as he's not shooting near the cunt's boundary then should be no problem.
    There's 10,000 things that affect perceived noise. Cartridge? Powder? Supressor? Velocit, wind direction, air density, reflective/absorbative surfaces and on and on.
    As long as the noise at boundary isn't hazardous (<113 dB I think) then neighbour can go spin.
    "Most" of the noise is muzzle blast. So supress everything.
    Larger diameter pills will displace more air so have "louder" sound signature than smaller ones.
    Diligentia Vis Celeritas
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  7. #7
    Member 40mm's Avatar
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    Ah, if its only to please a shitty neighbor then I wouldnt bother.

    Shoot away and be merry.
    Ryan_Songhurst and mimms2 like this.
    Use enough gun

  8. #8
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    Sounds like you need something along the lines of a Tank gun/ Howitzer suppressor . Google it and see if it fits?.

  9. #9
    Member marky123's Avatar
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    I used to be a member of a club that had a 5’ diameter 100m steel tube range.It was a decommissioned flare stack from an oil refinery.The noise inside was ‘interesting...’
    timattalon and 40mm like this.

  10. #10
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    what about digging a trench/cutting and roofing it with a tunnel house or even just big tarps overlaid with old carpet on frames.
    timattalon and r87mm like this.

  11. #11
    Member norsk's Avatar
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    Line 30 used car tyres up and shoot down the middle.
    It works like a giant suppressor and is free.
    mimms2 and XR500 like this.
    "Sixty percent of the time,it works every time"

  12. #12
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    To eliminate any heartache, and before you spend any coin, consult your local authority (Council) AND the neighbour. Best of luck with this venture!

  13. #13
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    Quote Originally Posted by Ranger 888 View Post
    To eliminate any heartache, and before you spend any coin, consult your local authority (Council) AND the neighbour. Best of luck with this venture!
    Is the neighbour on the council?

    Maybe I'm reading too much into it. I certainly don't have all the facts.
    But the only real solution for whiney neighbours, is that they either stop whining, or fuck off. (assuming it's all safe and lawful and you were there first)
    40mm likes this.
    Diligentia Vis Celeritas
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  14. #14
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    Quote Originally Posted by norsk View Post
    Line 30 used car tyres up and shoot down the middle.
    It works like a giant suppressor and is free.
    Buddy and I set this up a while ago on his bush block..........12 used quad bike tyres on a pipe frame extending down range from the front of the shooting bench. Each tyre was filled with Tetron ( soft packing used for protecting flowers for export) and we cut chicken wire into strips to hold it inside the tyres. We then added an electric radiator fan on a swing frame that can be swung across the 'mouth' of the suppressor and ran a lead to the quad bike so you can clear the air between shots. Worked well and even unsuppressed centrefire calibers get cut down to unsuppressed high velocity 22 rounds 100m away. That was until the neighbour built a hut 100m away over the boundary........

    Here is a pic.........

    Well, there would be a pic if the bloody forum would let me upload it...........

    Try again......

    Nope......
    308 likes this.

  15. #15
    Member 40mm's Avatar
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    Quote Originally Posted by Ranger 888 View Post
    To eliminate any heartache, and before you spend any coin, consult your local authority (Council) AND the neighbour. Best of luck with this venture!
    on the other hand, it is sometimes best to say nothing.

    All depending on the 'situation'
    Use enough gun

 

 

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