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Thread: 7.62x39 to 6.5 Grendel?

  1. #1
    Boolit Grand Master Texas by God's Avatar
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    7.62x39 to 6.5 Grendel?

    I read some old threads on it; some claim it's easy as 30 to 25-06; others disagree. Anyone do this? Yes I realize 6.5 Gr brass is available but there's more x39 by a bunch.

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  2. #2
    Boolit Master

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    I do it all the time. I mostly only ise converted brass. Works great. You have to have a Grendel Type 2 bolt or a 7.62x39 bolt. The case heads have different thicknesses. Type 2 bolt or 7.62x39 bolt can shoot both cases. Type 1 bolt can only shoot Grendel brass.

    Before the fire form the case capacity is lower. I use a light charge of 2400 to fireform. Then load as normal.

    When i compared case capacity of converted brass to grendel brass it was the same. So on a whim I used the same charge of H4895 in the Grendel brass and works great for both brass types. I probably should tune a load for the Grendel brass because of the primer difference but its for mass plinking and not precision.

    Saving up now for another custom barrel so i can go over 1600 fps. I want either a 1 in 10 or a 1 on 11.

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    Last edited by Rcmaveric; 12-05-2018 at 01:13 AM.
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  3. #3
    Boolit Master

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    When reforming I just drop the powder charge about two grains over normal Grendel load for the bullet weight. Some x39 brass has less case capacity than others, I have found out.

  4. #4
    Boolit Grand Master Texas by God's Avatar
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    Thanks, guys.

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BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
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