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300 Weatherby mag Handload

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Unread 03-19-2008, 05:34 PM
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Join Date: Jan 2005
Posts: 260
Someone please chime in and help this guy! BTW--Just measured a 180 accubond and a 180 tsx for bearing area with a bullet comparator and caliper. REsult....Accubond has .559 shank to engrave the rifling...tsx .447. In all honesty I thought the tsx would be less (But it is still 20% less). And I should amend my statement about long shank bullets making more pressure to say....any time you compare two bullets of like alloy and lead hardness....the longer shank WILL ALWAYS MAKE MORE PRESSURE.

Last edited by kraky2; 03-19-2008 at 06:36 PM.
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    Unread 06-04-2012, 10:17 AM
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    Re: 300 Weatherby mag Handload

    What issues would I have working up some loads with Retumbo and 185 VLD's......I have a ton of supplies for this combo...I'm trying to help a Buddie out...please any info ..Thx ,Don
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    Unread 06-04-2012, 11:51 AM
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    Re: 300 Weatherby mag Handload

    The problem you will run into using retumbo with the 180 grain and lighter bullets in the 300 wby is you run out of case capacity and will have a very compressed load. A faster powder would be better. Something in the h4831, re22, imr 7828 range. Retumbo will work you will just have a very compressed load with a very full case. Your 80 grain load of retumbo is way to light a load for the 300 wby with 86-88 grains being a good load but you will be crunching powder.
    Predictions are difficult, especially when they involve the future
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    Unread 06-04-2012, 06:49 PM
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    Re: 300 Weatherby mag Handload

    Put a strain guage on that thing or you don't have a clue what the pressure is. I had one on my last 7stw and it was an eye opener. Many things I thought were true suddenly weren't.

    As far as retumbo in the 300 wby, go for it. I do like rl25, but if single base floats your boat, that's one of the best for that cal. Use the hodgdon website for charge weights. If data is available, I use it. We were using Retumbo in a 300 win and getting top speeds, so the wby with its 10% more capacity will not be a problem at all.
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    Unread 06-05-2012, 03:42 AM
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    Re: 300 Weatherby mag Handload

    Thanks fellas ....can I pull the bullet out a bit,even though its a free bore?as long as they fit in magazine well?...that should take care of crushing powder right?? . Thank you soo much for your imput .Don

    Last edited by Dknox; 06-05-2012 at 03:53 AM. Reason: add info
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    Unread 12-10-2012, 05:31 PM
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    Re: 300 Weatherby mag Handload

    I find I can load more powder with the TSX bullets as they have the bands. In about 30 of my rifles the powder charge with the TSX is either equal to or a little more than my accubonds loads. I like both bullets and get good velocity with both but the accubonds have a higher bc and out past 400 yards there is a difference. I would try 7828 also and retumbo may shoot the best in your gun , if you had some MRP powder it really gets good velocity in the weatherby rounds. Heck try them all and see which one gives speed and accuracy.
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    Unread 04-15-2013, 05:13 PM
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    Re: 300 Weatherby mag Handload

    The best powder I have used in my 300 weatherby with 180gr Part or GrandSlam is

    26" barrel is best to get the most VEL

    Reloader 22 @ 84.0
    fed 215GM primer in WBY cases
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