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Overfilling 243 win mag case

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  #1  
Unread 12-13-2013, 01:15 PM
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Join Date: Apr 2013
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Overfilling 243 win mag case

Hi

Ive been reloading for 243 win mag with 87 grain Hornaday V max. I find that with 47 grains Somchem S 385 powder I find that the powder is just below the case mouth and the bullet seats on the powder.

Is this a problem?
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  •   #2  
    Unread 12-13-2013, 02:21 PM
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    Join Date: Mar 2008
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    Re: Overfilling 243 win mag case

    I'm assuming you are talking about a 243wssm . if this is what you have my quickload shows 47 grains at 100.7% case fill . max is 49.4 grains at 105.8 % case fill . so this should be ok , as far as a compressed load goes . are you using a funnel with a drop tube ? a drop tube funnel will help settle the powder for easier bullet seating . usually about 105% case fill is about as full as I want to work with .



    if you are working with a 243 win 47 grains will be 101.2 % case fill .
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      #3  
    Unread 12-13-2013, 10:01 PM
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    Re: Overfilling 243 win mag case

    I use a long droptube on a funnel myself. But powder 'fit' for a given capacity really comes down to SLOWER filling.
    Don't drop the powder in the case. Pour it, slowly.
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      #4  
    Unread 12-14-2013, 02:27 AM
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    Re: Overfilling 243 win mag case

    Thanks guys

    I'm using a 243 win mag with a conventional funnel and drop tube. I was just concerned when I saw that the powder was just below the mouth. I have loaded progressively up from 45 grains so I should pick up any pressure problems. My main concern was that I was compressing the powder when seating the bullet.
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      #5  
    Unread 12-14-2013, 03:01 AM
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    Re: Overfilling 243 win mag case

    Quote:
    Originally Posted by mosh338 View Post
    My main concern was that I was compressing the powder when seating the bullet.
    Most manuals identify compressed loads as such. The Nosler I have lists % of case capacity. Compressed loads are a fact of life with some combinations.

    I like loads that are slightly compressed, but still slightly below what most sources identify as maximum. Just me.
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      #6  
    Unread 12-23-2013, 01:27 AM
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    Join Date: Jun 2011
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    Re: Overfilling 243 win mag case

    Mosh, You should be fine, finding powders that are near the fill capacity for a case have the tendency to be more accurate. I fill my .243 up all the way with H-1000 and it loves it!
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