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Thread: 325 wizbang and IMR 4007 SSC range report

  1. #1
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    Default 325 wizbang and IMR 4007 SSC range report

    I worked up a load for the 325 wsm, 180gr TSX using IMR 4007 SSC powder. I could not find any load data for this combo so I looked at published load data for other 180gr bullets and went from there. I loaded and shot the following set of 3:

    Winchester brass trimmed to 2.090, WLRM primer, .035 off the lands, IMR 4007 SSC

    64gr
    2980
    2999
    3038
    about 3 inch group

    65gr
    3095
    3099
    3070
    about 1.25 inch group- see pic

    66gr
    3101
    3098
    3080
    about a 3 inch group... huh ??

    Published load data for the 180 TSX with other powders comes in at about 3070 or 3080fps. It looks like I'm there with 65gr IMR 4007 SSC. Barnes recommends .050 off the lands. I'm going to mess around a little more just for the fun of it to see if I can tighten up the group a little more. I'm not sure what;s up with the 66gr load. I may have to try those again incase a I messed something up. The Kimber shoots accubond factory loads sub moa. I'll see if I can get the TSX's there. If not, no biggie, the 65gr load the way it is will be headed to the Brooks for sheep in about 5 weeks


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    Default Same powder with 220gr Sierra GameKings

    I've been messing around with 220gr Sierra GameKings as well. According to Sierra this bullet was designed for the 8mm Rem Mag and therefore is a little tougher than lighter GK's. They call it their long range bullet. I understand the did the same thing with the 225gr .338. A little tougher bullet than say the 180gr .30's, thicker jackets. Anyway, I had worked up a load that shot very well at a little over 2700 fps. I've been shooting for 2800 with a 220gr bullet. I bumped it up a little and here is what I got.

    Winchester brass trimmed to 2.090, WLRM primers, .023 off the lands, IMR 4007 SSC

    62.5gr
    2736
    2760
    2759
    about a 3 inch group

    63gr
    2803
    2793
    2793
    about 1.25 inch group, identical to the TSX load above- see pic

    This is it. Should be a great 300yd+ moose round up in the high country.

    Oh, the other 2 holes are 360gr 45 Colt rounds shot out of my Puma 454 Casull at 105 yds off the bench.


  3. #3
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    Default

    Quote Originally Posted by Snyd View Post
    I've been messing around with 220gr Sierra GameKings as well. According to Sierra this bullet was designed for the 8mm Rem Mag and therefore is a little tougher than lighter GK's. They call it their long range bullet. I understand the did the same thing with the 225gr .338. A little tougher bullet than say the 180gr .30's, thicker jackets.
    Do you mean the 215 grain .338 or the 250 grain? I am not aware of a 225 Sierra for the .338. I'd be interested to know if the 215 is more stoutly constructed than the general GK line of bullets.

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    Quote Originally Posted by 1Cor15:19 View Post
    Do you mean the 215 grain .338 or the 250 grain? I am not aware of a 225 Sierra for the .338. I'd be interested to know if the 215 is more stoutly constructed than the general GK line of bullets.
    I was trusting my 48 yo memory and thought they were 225's. I'd call Sierra, I do know that in the heavier GK's for magnum calibers with higher velocities, they said they have thicker jackets.

  5. #5
    Member 1Cor15:19's Avatar
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    Quote Originally Posted by Snyd View Post
    I was trusting my 48 yo memory and thought they were 225's. I'd call Sierra, I do know that in the heavier GK's for magnum calibers with higher velocities, they said they have thicker jackets.
    Thanks Snyd. I'll give the Bulletsmiths a call.

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