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Thread: N120 for the 30BR

  1. #1
    Join Date
    Apr 2008
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    Cloudcroft, NM
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    651

    N120 for the 30BR

    As many of you know, I have some of my 30-30 barrels chambered in a .150" short 30-30. This cartridge equals the 30BR in capacity and velocity. Forget about the difference in the shape of the case. I have proven many times that this cartridge duplicates the 30BR in grain for grain velocity comparisons. With that said, keep one thing in mind. My bullet dies are 9 ogive, so they seat about .075" further out than a 7 ogive. Because of this, I have to shoot about 34.5 grains of H4198 to attain the same velocity (3020 -3040 fps) as would normally be seen with around 33.8-34gr. of H4198 using a 7 ogive bullet. The bullet weight also makes a little bit of difference. The testing below is for 110gr. and 118gr. bullets, but both are out of the same 9 ogive die.

    By weight, the charges of N120 approach that of H4198. However, the N120 is more dense. The 33.5gr load of N120 was about .25" down the case neck, and this was with no drop tube. I just poured it from the pan into a funnel fairly fast. I did not try to push high velocities. I'm sure 100 plus fps increase is very doable. This powder is similar in size to the LT powders.

    Turner 110gr. 9 ogive .010" into lands 22.5" barrel

    31.0gr. - 2910 fps
    32.0gr. - 2976 fps
    33.0gr. - 3052 fps


    Turner 118gr. 9 ogive .010" into lands

    32.0gr. - 2923 fps
    33.0gr. - 2990 fps
    33.5gr. - 3028 fps

    reduce these loads by about .5 grains for a 7 ogive bullet to attain similar velocities.

    Michael
    Last edited by mturner; 06-10-2019 at 02:02 AM.

  2. #2
    Join Date
    Nov 2006
    Location
    Augusta, Maine & Palm Coast, Fl
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    My load

    for the 30 BR is 34.4. I don't really care how fast it goes as long as they keep going in the same single 308 bullet hole. I shot a borrowed rifle this past weekend that was using 35.5g of 4198 and it shot awesome as well. 115 g bullets. Hard to get too much H-4198 in a 30 BR case, me thinks.

    I have played with 120 in the past and think I remember sticking a bolt with it !

    Pete

  3. #3
    Join Date
    Nov 2006
    Location
    Augusta, Maine & Palm Coast, Fl
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    Actually

    Quote Originally Posted by Pete Wass View Post
    for the 30 BR is 34.4. I don't really care how fast it goes as long as they keep going in the same single 308 bullet hole. I shot a borrowed rifle this past weekend that was using 35.5g of 4198 and it shot awesome as well. 115 g bullets. Hard to get too much H-4198 in a 30 BR case, me thinks.

    I have played with 120 in the past and think I remember sticking a bolt with it !

    Pete
    I got thinking about this and It was N110 I stuck the bolt with! Sorry for the fake news.

    Pete

  4. #4
    Join Date
    Apr 2008
    Location
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    Quote Originally Posted by Pete Wass View Post
    I got thinking about this and It was N110 I stuck the bolt with! Sorry for the fake news.

    Pete

    The N120 is capable of getting too hot in the 30BR, or my .150" short 30-30, but it's not crazy sensitive. The loads I shot were high density loads, that were almost touching the base of the bullet if i don't trickle the charge into the case.

    That N110 is similar to H110 in burn rate. Basically a 44 magnum pistol powder.

    Michael

  5. #5
    Join Date
    Nov 2006
    Location
    Augusta, Maine & Palm Coast, Fl
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    I was new and adventurous back then

    Quote Originally Posted by mturner View Post
    The N120 is capable of getting too hot in the 30BR, or my .150" short 30-30, but it's not crazy sensitive. The loads I shot were high density loads, that were almost touching the base of the bullet if i don't trickle the charge into the case.

    That N110 is similar to H110 in burn rate. Basically a 44 magnum pistol powder.

    Michael
    I had bought an old 30 BR VFS rifle and was looking for SPEED, back when I thought it was the answer. Good the barrel wasn't terribly tight

    Pete

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