Results 1 to 6 of 6

More Penetration Testing

This is a discussion on More Penetration Testing within the Firearms & Ammunition forums, part of the FIREARMS & AMMUNITION, HUNTING EQUIPMENT category; Caliber: 470 Nitro Express Rifle: Krieghoff Double Twist Rate: 1 in 18.9 Brass: Jamison Primer: Remington 9 1/2M Powder: Reloder ...

  1. #1
    Mike70560's Avatar
    Mike70560 is offline AH Fanatic
    Joined
    Mar 2009
    Posts
    799

    Member of NRA, DU, DSC

    Hunted Zimbabwe, Mozambique, Tanzania

    Default More Penetration Testing

    Caliber: 470 Nitro Express
    Rifle: Krieghoff Double
    Twist Rate: 1 in 18.9
    Brass: Jamison
    Primer: Remington 9 1/2M
    Powder: Reloder 15 for standard velocity load (approximately 2100 fps)
    AA 5744 for reduced loads (approximately 1650 FPS)

    The test box is fabricated from 2 by 6 pine boards and is 72 long.
    Test media consisted of luan, 12 of saturated newspaper, 2 by 6 treated pine (shooting through the 1 58 thickness), an approximate 1 void and then a series of twelve pieces of plywood with ten saturated newspapers 20 pages each between each piece of plywood (plywood, newspaper, plywood, newspaper etc) and approximately 33 of saturated newspaper to fill the box. Great care was taken to make certain the newspaper was thoroughly soaked in a tub prior to placing in the test bed.
    After placing the paper in the test bed excess water was permitted to drain for 30 minutes.
    The bullet entered the box at 32 feet from the muzzle.

    Bullets tested:
    North Fork 500 Grain solid
    Bullet Length: 1.414
    Bullet Meplat: .335 or 70.67% of diameter

    Test consisted of firing consisted of firing two North Fork bullets in the test media at standard Nitro velocity and two North Fork bullets at reduced velocity.

    Reduced Velocity:
    Average impact velocity of the was 1672. The first round stopped in the 11th piece of plywood. Total penetration was approximately 38. The second round stopped between the 11th and 12th piece of plywood. Total penetration was approximately 39.

    Nitro Velocity:
    The two bullets fired at standard Nitro velocities penetrated through all twelve pieces of plywood and approximately 21 more than the lower velocity rounds for a total of 60.

    Penetration was usual for the North Fork bullets, perfectly straight.



    The picture above is the first piece of plywood the bullets penetrated. Note the location of the holes.



    The picture above is the 11th piece of plywood the bullets penetrated. Note the location of the holes as they relate to the first picture.



    This is where the standard Nitro velocity rounds stopped. You can barely see the bullet in the top hole above the very visible bullet. Again note the location of the holes after traveling through another 21 of wet newspaper.

    Caliber: 470 Nitro Express
    Rifle: Krieghoff Double
    Twist Rate: 1 in 18.9
    Brass: Jamison
    Primer: Remington 9 1/2M
    Powder: Reloder 15 for standard velocity load (approximately 2100 fps)
    AA 5744 for reduced loads (approximately 1650 FPS)

    The test box is fabricated from 2 by 6 pine boards and is 72 long.
    Test media consisted of luan, 12 of saturated newspaper, 2 by 6 treated pine (shooting through the 1 58 thickness), an approximate 1 void and then a series of twelve pieces of plywood with ten saturated newspapers 20 pages each between each piece of plywood (plywood, newspaper, plywood, newspaper etc) and approximately 33 of saturated newspaper to fill the box. Great care was taken to make certain the newspaper was thoroughly soaked in a tub prior to placing in the test bed.
    After placing the paper in the test bed excess water was permitted to drain for 30 minutes.
    The bullet entered the box at 32 feet from the muzzle.

    Bullets tested:
    Woodleigh 500 Grain solid
    Bullet Length: 1.333 Prior to firing
    Bullet Meplat: Round Nose

    Test consisted of firing two Woodleigh bullets in the test media at standard Nitro velocity and two Woodleigh bullets at reduced velocity.

    Reduced Velocity:
    Average impact velocity was 1670. This was approximately 40 FPS faster than my previous Woodleigh loads. The ambient temperature was approximately 20 warmer for this test and I am not certain how temperature sensitive 5744 is. The first round stopped in the 7th piece of plywood. Total penetration was approximately 28.5. The second round stopped between the 8th and 9th piece of plywood. Total penetration was approximately 32. Both bullets were sideways by the fifth board.

    Nitro Velocity:
    Average impact velocity was 2070. The first round stopped in the 8th piece of plywood. Total penetration was approximately 31. The second round stopped in the 9th piece of plywood. Total penetration was approximately 33. Both bullets were sideways by the seventh board.

    Bullet length grew by .011 due to pushing the core out of the base.

    This is the fifth test I have conducted with the Woodleighs. I also have conducted five tests with the North Forks. This may sound like a broken record but the North Forks have consistently outperformed the Woodleighs regardless of velocity or test media.



    The picture above is the first piece of plywood the bullets penetrated. Note the location of the holes.



    The picture above is the 5th piece of plywood the bullets penetrated. Note the location of the holes as they relate to the first picture. Bullets are beginning to go sideways and off course.



    More sideways bullets
    Attached Images Attached Images

  2. #2
    enysse's Avatar
    enysse is online now AH Ambassador
    Joined
    Jan 2009
    Posts
    5,212

    Member of Northeast Wisconsin SCI chapter, Lifetime member of NRA,RMEF

    Hunted Namibia, South Africa (East Cape, Guateng and Limpopo)

    Default

    It tells me these North Fork bullets are serious medicine!!!! Better beware of the background behind the animal...because this bullet is going through! I still think the Woodleigh is a good bullet...just that it has a different purpose.

  3. #3
    Mike70560's Avatar
    Mike70560 is offline AH Fanatic
    Joined
    Mar 2009
    Posts
    799

    Member of NRA, DU, DSC

    Hunted Zimbabwe, Mozambique, Tanzania

    Default

    enysse,

    You are right I could shoot through a couple of buffalo with these. I think in terms of elephant when using NFs, although I am anxious to try same North Fork cup points in my 470.

    Started testing some Hornady DGS bullets. Decent results, better than Woodys and not as good as North Forks.

    There is no doubt the Woody's have killed plenty of game and will continue to do so, but from what I have seen and what has been proven by two other guys in different parts of the country, the NF out-penetrate hands down.

  4. #4
    1Shot2Kills's Avatar
    1Shot2Kills is offline AH Senior Member
    Joined
    Mar 2010
    Posts
    75

    Member of Bear-Hunting.Org

    1Shot2Kills has no Photos

    Default

    I love the format of this test; it would be useful if you could also do it in video format. Shoot me a private message if you want some help on recording your next penetration test. It's rather simple and relatively cheap to make it a hands free process.
    Come visit my elk hunting website to get some amazing elk hunting tips at: http://www.elk-hunting.org/elk-hunting-tips

  5. #5
    Skyline is offline AH Fanatic
    Joined
    Dec 2008
    Posts
    648

    Member of SCI Life Member, MLOA, DU, MWF, MTA

    Default

    Good stuff Mike.

  6. #6
    Mike70560's Avatar
    Mike70560 is offline AH Fanatic
    Joined
    Mar 2009
    Posts
    799

    Member of NRA, DU, DSC

    Hunted Zimbabwe, Mozambique, Tanzania

    Default Testing Hornady Solids

    Caliber: 470 Nitro Express
    Rifle: Krieghoff Double
    Twist Rate: 1 in 18.9
    Brass: Jamison
    Primer: Remington 9 1/2M
    Powder: Reloder 15

    The test box is fabricated from 2 by 6 pine boards and is 72 long.
    Test media consisted of luan, 12 of saturated newspaper, 2 by 6 treated pine (shooting through the 1 58 thickness), and approximately 60 of saturated newspaper. Great care was taken to make certain the newspaper was thoroughly soaked in a tub prior to placing in the test bed.
    After placing the paper in the test bed excess water was permitted to drain for 30 minutes.
    The bullet entered the box at 32 feet from the muzzle.

    Bullets tested:
    Hornady 500 Grain solid @ an average impact velocity of 2079
    Bullet Length: 1.2935 Before firing
    Bullet Length: 1.294 After firing
    Bullet Meplat: .271 or 57.3% of diameter

    The test consisted of firing consisted of firing 3 Hornady bullets in the test media.

    Shot 1: 48 of straight line penetration, it began to turn sideways and traveled another 21 stopping sideways.

    Shot 2: 40 of straight line penetration, it began to turn sideways and traveled another 23 stopping sideways.

    Shot 3: 34 of straight line penetration, it began to turn sideways and traveled another 20 and exited the top of the box.


    Better than the Woodleigh, not as good as the North Fork.



    .474 500 Grain Hornady

Similar Threads

  1. Stand Up Rifle Rests for DR Load Testing
    By gxsr-sarge in forum Double Rifles
    Replies: 0
    Last Post: 08-27-2012, 06:53 PM
  2. Testing a new broad head.
    By Fritz Rabe in forum Bowhunting Africa
    Replies: 34
    Last Post: 07-24-2012, 08:07 AM
  3. More Bullet Testing
    By Mike70560 in forum Firearms & Ammunition
    Replies: 3
    Last Post: 05-19-2010, 12:07 PM
  4. Bullet Penetration Test
    By Mike70560 in forum Firearms & Ammunition
    Replies: 9
    Last Post: 03-08-2010, 05:27 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •