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IMR 4007SSC loads

This is a discussion on IMR 4007SSC loads within the Ammunition forums, part of the M14 M1A Forum category; Because of a wrong click on the computer, I now have 8 lbs of unreturnable IMR 4007SSC. Anyone tried it in the M1A or any ...


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Old June 23rd, 2011, 02:21 PM   #1
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IMR 4007SSC loads

Because of a wrong click on the computer, I now have 8 lbs of unreturnable IMR 4007SSC.
Anyone tried it in the M1A or any advice for loads? Of course I have copied the IMR load data but am wondering if anyone has practical experience or ideas.

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Old June 23rd, 2011, 04:57 PM   #2
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Quote:
Originally Posted by Charon View Post
Because of a wrong click on the computer, I now have 8 lbs of unreturnable IMR 4007SSC.
Anyone tried it in the M1A or any advice for loads? Of course I have copied the IMR load data but am wondering if anyone has practical experience or ideas.
What bullet weight and what case are you planning on using?

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Old June 23rd, 2011, 05:15 PM   #3
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You can use Hodgdon's load data.

http://data.hodgdon.com/cartridge_load.asp

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Old June 24th, 2011, 10:31 AM   #4
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168 Nosler Competition. Various cases - Lapua, Remmington BR (friend gave me 100), Winchester.

The M1a NM shoots well with the above and 41.2 g IMR 4064 (which I meant to buy--- duuuuumy me)

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Old June 24th, 2011, 11:23 AM   #5
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I use Lapua cases and you have recognize that they have more volume than most cases so they can use more powder. The powder charge weight range should still be safe for smaller volume cases.

I based my estimates on;
  • Lapua case
  • OAL of 2.83"
  • Nosler 168gn CC bullet

I used my QuickLOAD ballistics software to estimate pressures and muzzle velocities.

The estimated results;
44.2 - 45.2 grains of IMR 4007 SSC should be the range of charge weights that would give you the greatest chance of an accurate load. This range should keep your pressures at no more than about 49,000 PSI at the top end (using the Lapua case) and the muzzle velocity being about 2560 FPS with that pressure. If I had to guess, I would say that the most accurate powder charge weight will be around 45 grains plus or minus a couple of tenths of a grain using the Lapua case.



Quote:
Originally Posted by Charon View Post
168 Nosler Competition. Various cases - Lapua, Remmington BR (friend gave me 100), Winchester.

The M1a NM shoots well with the above and 41.2 g IMR 4064 (which I meant to buy--- duuuuumy me)

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Old February 11th, 2013, 11:50 AM   #6
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How did this ammo turn out? As you may know powder is hard to come buy now I run across 2 cans of IMR 4007 ssc today pick them both up my brass is federal, primers are federal 210, bullets are 168gr sie hpbt. I usulay use BLC-2

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