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7X338 Norma 35 deg Improved

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  #1  
Unread 02-18-2010, 05:42 PM
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7X338 Norma 35 deg Improved

I just put this together with a 28" Brux barrel with 8.5-1 twist and have been to the range a few times and it looks very promising. Today I shot a .290 3 shot group(100 yds) with 168 SMK with 89 gr. of Retumbo at 3280 with little pressure signs.I wanted to be able to shoot the 162 Amax and since the case capacity is 4 gr. less H2o than the 7 Rum I was wondering if any of you 7 Rum owners might have some load information that might help me.

Ken
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  •   #2  
    Unread 02-18-2010, 09:00 PM
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    Re: 7X338 Norma 35 deg Improved

    Is retumbo the only powder you have tried? Have you tried any heavier pills like the 180 berger or 189 Bob C. bullets?


    Brent
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      #3  
    Unread 02-18-2010, 09:26 PM
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    Re: 7X338 Norma 35 deg Improved

    Quote:
    Originally Posted by blipelt View Post
    Is retumbo the only powder you have tried? Have you tried any heavier pills like the 180 berger or 189 Bob C. bullets?


    Brent
    No I haven't but I do have some of the 180 Berger's on the way I am not familiar with the 189 Bob C bullets could you give me more info. on them.
    Thank You for the reply
    Ken
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      #4  
    Unread 02-18-2010, 09:32 PM
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    Re: 7X338 Norma 35 deg Improved

    With the 180 Berger, quikload is telling me that 89gr Retumbo will get you 3150fps , loaded off the lands @ COAL of 3.60. That should be close to top pressure, but obviously work yourway up.
    If you are going to load on the lands , 84gr is going to be close to max.
    With the 168's 90-92 gr will get you close to max. Again work your way up to these loads, as this just based off of quikload, and not personal experience.
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      #5  
    Unread 02-18-2010, 10:16 PM
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    Re: 7X338 Norma 35 deg Improved

    Quote:
    Originally Posted by trueblue View Post
    With the 180 Berger, quikload is telling me that 89gr Retumbo will get you 3150fps , loaded off the lands @ COAL of 3.60. That should be close to top pressure, but obviously work yourway up.
    If you are going to load on the lands , 84gr is going to be close to max.
    With the 168's 90-92 gr will get you close to max. Again work your way up to these loads, as this just based off of quikload, and not personal experience.
    I think you are right on with the 168's because the 215 primers are getting flat but my experience with them is that are softer than the 250's I am at 89 now so I am guessing that about 91 will be about max.
    Thanks for the info. for the 180's I hope they shoot like the 168 SMK's are. How about the 162 Amax have you found them to like to be close or jump to the lands with a .625 bc I would like to get them to shoot consistently.Thank You
    Ken
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      #6  
    Unread 02-21-2010, 11:19 AM
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    Re: 7X338 Norma 35 deg Improved

    don't really know to much about them yet. they are a 189 vld style bullet. Did a search here and found them and decided to give them a try pm me a address and I could send you some of each with the contact info.



    Brent
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    Last edited by blipelt; 02-21-2010 at 11:22 AM. Reason: more
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      #7  
    Unread 02-21-2010, 02:07 PM
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    Re: 7X338 Norma 35 deg Improved

    Quote:
    Originally Posted by blipelt View Post
    don't really know to much about them yet. they are a 189 vld style bullet. Did a search here and found them and decided to give them a try pm me a address and I could send you some of each with the contact info.



    Brent
    Do they look similar to the Berger 180? I still have about 12# of H5010 and some H870 which I used in my 7 STW and 30/378 I want to try it with the 180 Bergers and it sounds like those 189's that you have would be good to try also.Today I am going to check the case capacity, H2o, with a bullet seated to base of neck, load some more an go back to the range tomorrow.

    Ken
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