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View Poll Results: What is the minimum velocity at which the 162gr. AMAX will reliably perform on deer?
1,000 fps or slower 2 4.00%
1,100 fps 5 10.00%
1,200 fps 8 16.00%
1,300 fps 5 10.00%
1,400 fps 11 22.00%
1,500 fps 6 12.00%
1,600 fps 4 8.00%
1,700 fps 2 4.00%
1,800 fps or faster 7 14.00%
Voters: 50. You may not vote on this poll

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162 AMAX (.284) Min Expansion Velocity

 
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  #15  
Old 08-03-2012, 11:18 PM
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Re: 162 AMAX (.284) Min Expansion Velocity

Can you enlighten me on the SXR's please...I've havent heard of them yet. Thanks
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  #16  
Old 08-03-2012, 11:22 PM
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Re: 162 AMAX (.284) Min Expansion Velocity

Elkaholic why didn't you vote! I noticed you didn't actually influence the poll by voting.
Anyways thanks for sharing.
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  #17  
Old 08-04-2012, 10:06 AM
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Re: 162 AMAX (.284) Min Expansion Velocity

Quote:
Originally Posted by hmbleservant View Post
Elkaholic why didn't you vote! I noticed you didn't actually influence the poll by voting.
Anyways thanks for sharing.
Sorry, I'll vote now. The SXR's are my own that I make for my 30's......Rich
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  #18  
Old 08-06-2012, 07:51 PM
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Posts: 284
Re: 162 AMAX (.284) Min Expansion Velocity

We've done reduced velocity terminal performance testing of many bullet designs. If the bullet remains point forward until expansion, and if performance depends on expansion rather than tumbling, then the spin rate is not relevant to the expansion threshold. The expansion threshold depends only on the velocity and the test medium (as long as it remains point forward until expansion).

10% ballistic gelatin will most accurately predict the expected expansion on game. If gelatin is not available, then a row of water jugs or ziplock bags filled with water would be my second choice. In most cases, water will overestimate the expansion threshold, because water offers less resistance than gelatin. Wet phonebooks will tend to underestimate the expansion threshold because it offers more resistance than gelatin or tissue.

It is also notable that many bullet manufacturers underestimate the minimum expansion threshold. If you read the fine print, most do a pretty good job of measuring the threshold in ballistic gelatin, but then only require a 10% increase in bullet diameter to call the expansion a success. I think a 50% increase in diameter is a more reasonable minimum to categorize an event as the kind of expansion that would be desirable.

Even though we have not measured the expansion threshold in the AMAX, we expect it to be lower than most other bullets. My preferred AMAX load is doing 1730 fps at 1000 yards under hunting conditions, so I'm not really worried about exactly where the minimum is.

Last edited by Michael Courtney; 08-06-2012 at 08:26 PM.
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  #19  
Old 08-06-2012, 08:09 PM
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Join Date: Dec 2008
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Re: 162 AMAX (.284) Min Expansion Velocity

Quote:
Originally Posted by Michael Courtney View Post
We've done reduced velocity terminal performance testing of many bullet designs. If the bullet remains point forward until expansion, and if performance depends on expansion rather than tumbling, then the spin rate is not relevant to the expansion threshold. The expansion threshold depends only on the velocity and the test medium (as long as it remains point forward until expansion).

10% ballistic gelatin will most accurately predict the expected expansion on game. If gelatin is not available, then a row of water jugs or ziplock bags filled with water would be my second choice. In most cases, water will overestimate the expansion threshold, because water offers less resistance than gelatin. Wet phonebooks will tend to underestimate the expansion threshold because it offers more resistance than gelatin or tissue.

It is also notable that many bullet manufacturers underestimate the minimum expansion threshold. If you read the fine print, most do a pretty good job of measuring the threshold in ballistic gelatin, but then only require a 10% increase in bullet diameter to call the expansion a success. A think a 50% increase in diameter is a more reasonable minimum to categorize an event as the kind of expansion that would be desirable.

Even though we have not measured the expansion threshold in the AMAX, we expect it to be lower than most other bullets. My preferred AMAX load is doing 1730 fps at 1000 yards under hunting conditions, so I'm not really worried about exactly where the minimum is.
Michael.....I can tell that you have done some testing as your expansion media results duplicate what I have found. It is refreshing to me to hear someone respond without just winging it! (not that everyone on this forum does that)........Rich
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  #20  
Old 08-23-2012, 07:47 PM
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Re: 162 AMAX (.284) Min Expansion Velocity

I shot the A-Max at the water jugs the other day and recovered one out of three. The one I recovered had an impact velocity was about 1200 fps and there was no expansion, only the tip broke off. I shot a load that had an impact velocity of 1350 fps and I didn't recover it but I did notice some fragments in the bottom of the jugs so I am assuming that it expanded some. If you want to see pics search 280 grain Barnes LRX low end expansion velocity results
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  #21  
Old 08-27-2012, 08:36 AM
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Re: 162 AMAX (.284) Min Expansion Velocity

Apology for an ignorant question. Will the 162Amax stabilize well in 1:9.5 twist Rem.mag.?
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