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INTRODUCING Accubond Long Range

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  #106  
Unread 11-02-2012, 11:25 AM
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Re: INTRODUCING Accubond Long Range

Quote:
Originally Posted by shoots_5 View Post
Couldn't agree more! That lower limit would extend the reliable expansion range in a 260 from 980 yards to about 1240 if you go off the 1600 fps minimum of the Berger's compared to these. Now having said that, the energy is quite low, but I would think it would still be enough for something like an antelope.
Ya, and in my experience the 6.5 140 gr Bergers don't expand well at all at 1600 fps, more like 1900 fps for consistency. Elkaholic had a good thread about his experiences on this as well.

Scot E.
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  •   #107  
    Unread 11-02-2012, 11:27 AM
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    Re: INTRODUCING Accubond Long Range

    Michael,

    What bc and temps are you using to come up with the altitudes you predicted?

    I run all of my loads over double chronies and confirm those predicted bc's with drop tests. Yes I use pocket weather stations. No I don't set up chronies in front of the game. I do know that the published bc of the 150 AB is high and the temps were not standard.

    The game I hunt does not read lab reports and does not care about my double chronies either. Amax's blowing up in gelatin does sound like a lot more fun than penciling accubonds in there. I a huge fan of the Amax for LR hunting but I know they are also a double edge sword. Take the gel out of the equation, apply hair, hide and big bone and while the is fun in the lab there is no fun in the field.

    On the flip side, the AB is its own double edge sword in the opposite direction. I will give you that.

    So which is better for LR hunting? It depends on the Person, rifle, load, range and so on. We are just hoping to see this bullet bridge this gap to some degree.

    One thing is for sure, until we our hands on them this is all just speculation. Reality most likely rests somewhere between where we hope it is and where you think it is.

    Never the less there is excitement about them and for good reason.
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      #108  
    Unread 11-02-2012, 11:29 AM
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    Re: INTRODUCING Accubond Long Range

    We've learned that Trail Boss, Sr4759, and H4895 are useful for testing a wide range of impact velocities in gelatin for .308 bullets in either a .308 or 30-06 test platform. The longer bullets need the faster twist of 1 in 10" in the 30-06 to be stable at the lower velocities. For example, the chart below shows the muzzle velocities of a 200 grain bullet in our 30-06 test rifle for various loads across a wide range of desired impact velocities:

    Trail Boss (gr) V (fps)
    15 999
    16 1137
    17
    1169
    18 1210
    19 1146

    Sr4759
    18 1150
    19 1236
    20 1307
    21 1401
    22 1436

    H4895
    29 1465
    31 1540
    33
    1644
    35
    1747
    37
    1890
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      #109  
    Unread 11-02-2012, 12:00 PM
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    Re: INTRODUCING Accubond Long Range

    Quote:
    Originally Posted by Michael Eichele View Post
    Michael,

    What bc and temps are you using to come up with the altitudes you predicted?
    I used the manufacturer's BC and checked the "standard atmosphere at Altitude" button at JBM. Yes, the temperature and humidity come into it, but there's a much bigger change in air density with a few thousand feet change in altitude than with the entire range of humidity or 20 deg F.

    I lean toward AMAX because we tend toward cartridges and bullet weights that give 2900 fps. We've never lost an animal or had a long tracking job due to too much expansion in rapidly expanding designs. I have lost animals and had difficult tracking jobs due to insufficient expansion and expansion failures in hollow point and controlled expansion designs. I've also gotten lucky and anchored an animal on the second shot after the first shot penciled through the lungs.

    A few years back, we were testing the performance of the 110 VMAX in deer at 3500 fps. It was total fragmentation and about 8-10" of penetration. We recovered all the deer within 100 yards on broadside lung shots. One hypothesis I have regarding claims of overexpansion and failure to reach the vitals on deer sized animals is that the bullet has struck an intermediate object before hitting the animal in these cases. We had several cases of the years of a bullet failing to reach the lungs (apparently blowing up on the shoulder) and in every case, careful investigation revealed the intermediate object struck by the bullet before reaching the shoulder or chest of the deer. It was a small tree or tree branch in most cases, but in one case the shooter managed to hit the deer in spite of shooting through a 2x6 rest in the tree stand!

    In 6.5mm and larger, AMAXs at 2900 fps will all give at least 12" of penetration, and many of the higher sectional density bullets go 16-18". Penetration increases with range. This is fine for deer and cow elk, and the higher sectional densities are suitable for bull elk and hogs if the shooter can refrain from bad shot angles. We're also very happy with the accuracy of the AMAX, the shot to shot consistency of BCs, the lot to lot consistency of POI and BC, etc.

    Over the years, we've seen Noslers and Bergers have more issues with lot to lot changes in POI, accuracy, and BC. I don't think that hollow point match bullets can ever match the shot to shot BC consistency of plastic tipped bullets. Yes, you can trim the noses for BC consistency, but then the BC is lower, and you've tweaked the expansion characteristics.
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      #110  
    Unread 11-02-2012, 12:08 PM
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    Re: INTRODUCING Accubond Long Range

    Quote:
    Originally Posted by bigngreen View Post
    I've recovered a 140gr Accubond from a 270wsm after smoking through the lungs of a mule deer buck, impact velocity around 2500fps and I found the bullet in the dirt and it was not opened to the point that the tip was curling around except for the side that hit a rock, basically the tip had just shoved it open but it was to hard to mushroom in the animal. I won't use them under 2200 fps impact velocity.

    X2!

    I shot a buck last fall with the 140 accubond out of a 270wsm at about 100 yards. Three shot group in less than 3" through the heart and lungs and no expansion. The exit holes were cleaner than the entrance and no holes bigger than a nickle.
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      #111  
    Unread 11-02-2012, 12:12 PM
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    Re: INTRODUCING Accubond Long Range

    Wonder if Hornady has ever considered a bonded AMAX? They may following Nosler's foray into the mix with the ALR line of bullets.

    Bullets that shrapnel at high velocity are OK if they do so inside the lung cavity. Turns my stomach when I see the shrapnel in the shoulder, ham, backstrap, or neck meat.

    Last edited by phorwath; 11-02-2012 at 12:52 PM.
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      #112  
    Unread 11-02-2012, 12:14 PM
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    Re: INTRODUCING Accubond Long Range

    Quote:
    Originally Posted by CogburnR View Post
    X2!

    I shot a buck last fall with the 140 accubond out of a 270wsm at about 100 yards. Three shot group in less than 3" through the heart and lungs and no expansion. The exit holes were cleaner than the entrance and no holes bigger than a nickle.
    The glass half-full version is you recovered the deer with very little meat loss.

    Nickle-sized exit holes probably indicate some expansion. The bullets I've experienced with no expansion have left holes about the same size exiting as they did entering - at least on deer-sized game animals.
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