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Offline Sourdough

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Gong
« on: July 19, 2012, 04:58:08 PM »
Building a set of gongs to shoot at with Weatherby 30-378 and 338-378s.  Ranges will be from 500 to 1000 yards.  Questioning what thickness metal plate I should use.  Don't mind dings, just don't want pass-throughs.
 
Suggestions from anyone with experience with these heavy hitters would be appreciated.  Rog
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Offline PowPow

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Re: Gong
« Reply #1 on: July 20, 2012, 12:40:24 AM »
You might ask a piping contractor to sell you a used "blind flange".
It is a round disc with bolt holes to cap the end of a pipe.
Comes in various pipe diameters.

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Offline Nobade

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Re: Gong
« Reply #2 on: July 20, 2012, 12:53:32 AM »
Our range went to 3/4" AR500 gongs, which seems to hold up to most rifles. But a 408 Chey Tac still put holes in the 750yd. gongs where the big 338s didn't even scratch it. He got a stern talking to.
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Offline swifty22

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Re: Gong
« Reply #3 on: July 20, 2012, 11:55:30 AM »
Sour, The only ones I have ever used are are RR tie plates (between RR ties and the rail). I don't know about long range but at 100yds a 7 Rem mag. cratered them but wouldn't go through. However my 340 Wby w/250 gr Grand Slams and a max load of I-7828 punched a 1/2" hole through them like butter. I don't why the 7mm didn't go through (I don't remember the bullet but they weren't Grand Slams though). I had them hung on chains so they would swing, so my 2C worth-Muddy
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Offline Frank46

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Re: Gong
« Reply #4 on: July 21, 2012, 04:12:55 PM »
If you go the blind flange route, don't get the cast one. Get the fully machined one. The cast one is only rated to a few hundred psi whereas the fully machined one is for higher pressures. And yes the fully machined ones are more expensive. Frank
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Offline Varmint Hunter

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Re: Gong
« Reply #5 on: July 22, 2012, 11:53:42 AM »
You can get some ideas here.

http://www.bigdogsteel.com/
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Offline pastorp

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Re: Gong
« Reply #6 on: August 05, 2012, 07:47:28 AM »
Thicker than 1/2". That's what we used and even a 257 weatherby would shoot through them.

Regards,
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Offline Lloyd Smale

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Re: Gong
« Reply #7 on: August 06, 2012, 12:33:32 AM »
3/4 will work if its hardened steal like boiler plate. If not id go to one inch
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Offline Sourdough

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Re: Gong
« Reply #8 on: August 13, 2012, 09:25:17 AM »
Thanks for all the input.  I was able to find 3/8s inch hardened plate ate a local welding shop.  The owner just gave me two 12 X 24 pices.  He charged me for the 36 X 36.  Now to make stands to hold those heavy pices. 
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Where is old Joe when we really need him?  Alaska Independence    Calling Illegal Immigrants "Undocumented Aliens" is like calling Drug Dealers "Unlicensed Pharmacists"
What Is A Veteran?
A 'Veteran' -- whether active duty, discharged, retired, or reserve -- is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America,' for an amount of 'up to, and including his life.' That is honor, and there are way too many people in this country today who no longer understand that fact.

Offline Nobade

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Re: Gong
« Reply #9 on: August 13, 2012, 10:10:12 AM »
338-378 is gonna be really hard on those 3/8" gongs. Better put them really far away!
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