How much will it take to stop a 470?

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TedH
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How much will it take to stop a 470?

Post by TedH »

I've been gathering old phone books to use as a medium for testing my 470 Nitro cast bullets. I'll soak them in water and don't want to use any thing hard to simulate bone just yet. I want them to stop in just the wet phone books. I'm anxious to try some, but i don't know if i have enough material to stop them. How many inches of material do you think it will take to contain a flat nose 500 gr. bullet traveling at 2150 fps? They are fairly hard, cast from a #2 alloy duplicate.

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Re: How much will it take to stop a 470?

Post by Old Ironsights »

I'd start with a minimum of 24" worth... with 36" being a safer bet.
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Re: How much will it take to stop a 470?

Post by homefront »

WOW!

What the heck is a .470 nitro?

Looks like a battleship shell!
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Re: How much will it take to stop a 470?

Post by TedH »

It's an old English cartridge for dangerous game. Found mainly in the big double rifles.

http://en.wikipedia.org/wiki/.470_Nitro_Express

I've got about 24"-26" worth of phone books so far, and I think 36" would definately contain it. I guess I'll scrounge a few more books just to be safe.
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Re: How much will it take to stop a 470?

Post by Modoc ED »

I wouldn't think that the use of wet phone books would really give a good indication of penetration. To do so, each phone book would have to have the same number of pages, and would have to absorb equally in each book the same amount of water as the others.

MidwayUSA sells ballistic jellitan (sp?) at a reasonable cost and would in my opinion give a better indication of penetration.

Of course any .470 Nitro Express bullet, of proper construction should be sufficient to kill anything on this planet.

Just my .02¢
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Re: How much will it take to stop a 470?

Post by TedH »

I'm not so much interested in how far they will penetrate at this time, rather just how well the bullets hold together or don't. How much smearing, weight loss etc. Besides that, I'm cheap, and phone books are free. :D
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Re: How much will it take to stop a 470?

Post by 86er »

Here's what we do when trying to capture bullets. Use around 25" of wet phone books. Behind the phone books, get a cardboard box about 25"-30" by at least 15 inches wide and tall. Put a plastic garbage bag in the cardboard box as a liner and fill with water. If your bullet is in the books - fine. It is passes through, it should be captured in the water. To repeat, just change the garbage bag liner and fill with water again. At 25 yards with a 470-500 you might want to put another 12 inches of books behind your water box just in case.
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Re: How much will it take to stop a 470?

Post by Buck Elliott »

To reliably 'stop' hardcast slugs of that size & weight, you would do well to START with about 60" of wet phone books. The penetration capability of big-bore, monolithic bullets is incredible...
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Re: How much will it take to stop a 470?

Post by Jason_W »

Well, it takes 6" of wet paper just to stop a frangible .22 lr bullet, so the short answer is, "a lot".

Since you're probably not looking for expansion and won't be running a lot of tests, I would cook up about 24" of ballistics gel backed by a stack of plywood pieces at least a foot thick. The gel will record cavity and the wood will stop the bullet.
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Re: How much will it take to stop a 470?

Post by Doc Hudson »

TedH wrote:It's an old English cartridge for dangerous game. Found mainly in the big double rifles.

http://en.wikipedia.org/wiki/.470_Nitro_Express

I've got about 24"-26" worth of phone books so far, and I think 36" would definately contain it. I guess I'll scrounge a few more books just to be safe.

i don't think you are even half way there yet!

Granted I'm going by the performance of FMJ bullets, but any slug that will exit an elephant on a heart shot ain't gonna slow down much for three feet of paper. I'd suggest six feet as a minimum, and eight feet preferred.

That way, if I'm wrong and three or four feet of phone books stop the bullet, you have enough for another test.
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Re: How much will it take to stop a 470?

Post by Buck Elliott »

nobearsyet wrote:AT least 8ft of phone books, I did a similiar test in my backyard with a 338 Win Mag and it went in almost 5 feet, but those bullets aren't spitzers and I am assuming that a 470 doesn't produce the velocity of the 338 as bets I can tell the cartidge was originally loaded with either cordite or black powder in the really early days
On further consideration, I tend to agree.

At one of John Linebaugh's sixgun seminars, a .475 Linebaugh revolver penetrated almost 5 feet of wet newspapers with a 400 + grain bullets.

If still in doubt, set up an old DeSoto behind your bullet trap. That should stop just about anything...
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Re: How much will it take to stop a 470?

Post by Nobody »

:D
Last edited by Nobody on Thu Jul 30, 2009 9:24 pm, edited 1 time in total.
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Re: How much will it take to stop a 470?

Post by Pete44ru »

How 'bout, I volunteer my mother-in-law for backstop duty ?
She stops clocks, so she should be able to stop a bullet, too. ;) :mrgreen: :mrgreen:

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Re: How much will it take to stop a 470?

Post by Rimfire McNutjob »

I'll go 32 inches. Do I lose if I "go over"? :wink:
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Re: How much will it take to stop a 470?

Post by TedH »

No Rimfire, you wouldnt loose, but maybe we should start a pool and see who guesses the closest for a small prize. :lol:
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Re: How much will it take to stop a 470?

Post by mescalero1 »

pete44ru :shock: :lol:
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Re: How much will it take to stop a 470?

Post by 1886 »

Pete44ru wrote:How 'bout, I volunteer my mother-in-law for backstop duty ?
She stops clocks, so she should be able to stop a bullet, too. ;) :mrgreen: :mrgreen:

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Re: How much will it take to stop a 470?

Post by mescalero1 »

:o :shock: :lol:
mothers-in-law have a credibility problem here?
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Re: How much will it take to stop a 470?

Post by hocbj23 »

no apparently mothers in law have an expendability problem here-- they r expendable.BJ
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Re: How much will it take to stop a 470?

Post by mescalero1 »

:lol:
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Re: How much will it take to stop a 470?

Post by Old Ironsights »

hocbj23 wrote:no apparently mothers in law have an expendability problem here-- they r expendable.BJ
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Re: How much will it take to stop a 470?

Post by TedH »

Ok, here's what I'm planning to do. I've got right at 30" of phone books. I've also found cardboard boxes that are 15"x15"x30". Think I'll put the phone books in front of two of those boxes lined with trash bags and filled with water. That will be a total of 90" to stop the bullet. Maybe this weekend I can try it out and let ya'll know what happens.
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Re: How much will it take to stop a 470?

Post by Buck Elliott »

Wear a big hat and a raincoat...
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Re: How much will it take to stop a 470?

Post by TedH »

LOL! I hadn't thought of that. Maybe just an umbrella. :lol:
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Re: How much will it take to stop a 470?

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Re: How much will it take to stop a 470?

Post by Ysabel Kid »

homefront wrote:WOW!

What the heck is a .470 nitro?

Looks like a battleship shell!
Small field artillery fired from a shoulder weapon! :lol:
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Re: How much will it take to stop a 470?

Post by Doc Hudson »

I'll volunteer my ex-wife to stand in front of the phone books.
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Re: How much will it take to stop a 470?

Post by brucew44guns »

If that bullet will penetrate 5 feet of wet phone books, I'd think of the headache a Rhino would have taking a hit between the eyes!!
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Re: How much will it take to stop a 470?

Post by kimwcook »

As already stated, I think data from Linebaugh's testing would give a guy a close idea as to how much penetration you'd get.
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Re: How much will it take to stop a 470?

Post by Pete44ru »

Ya kin try a string tracker on the bullet bases, thar, Ted ! ;) :mrgreen: :mrgreen: :mrgreen:

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Re: How much will it take to stop a 470?

Post by buckeyeshooter »

Better put something behind it! My guess is that it goes through the whole deal. At least my .470 capstick with barnes solids does :shock:
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Re: How much will it take to stop a 470?

Post by TedH »

I bet a solid would, but I'm banking on these cast bullets mushrooming some and loosing some weight to smearing.
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Re: How much will it take to stop a 470?

Post by Saltcreek »

TedH wrote:LOL! I hadn't thought of that. Maybe just an umbrella. :lol:
Oh Great! He's going to look like Mary Poppins on the range. :D
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