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Thread: Full length vrs neck size loads

  1. #1

    Full length vrs neck size loads

    I have usually neck sized for my reloading. Now for few reasons am thinking of full length sizing some brass. Do people find their accuracy load changed? As the brass is soft I presume pressure swells case to chamber size relitively early on in the cycle so shouldn't make a difference. Looking for other people's experience. Obviously I will drop load and work back up if I do change.

  2. #2
    I used to only neck size my brass with a bushing so it doesn't get worked any more than it has to and then full length when it starts to get tight to chamber. The full length gave a slightly different poi than my neck sized.
    I now kind of full length but only to minimum measurements so the brass is still a very close match to the chamber and it is the same every time I fire it.
    The load development stayed the same.
    ...................................
    I'd rather have a bottle in front of me than a frontal lobotomy!
    Another 7mm08 shooter!

  3. #3
    You should try F/L resizing to 'fired case headspace' dimension.
    i.e. take a number of fired cases, remove the primer with a dedicated de-capping die, then measure with a headspace guage from the centre of shoulder to case head.
    Take the average dimension from the total and use that dimension to set your die.
    If you measure with primer in, there will likely be an additional couple of thou or more in dimension.

    Then set your F/L die so that it does not push the case shoulder back more than .002" - I use a rubber 'O' ring under my locking ring, so I can set the die and tweak tighter or loosen as necessary.
    You'll find resizing this way does not diminish brass life any more than neck sizing.
    Then, after each three or four firings, anneal your brass (an easy peasy job) to renew the brass elasticity and regain good pressure seal once more.

    Since doing this quite a few years ago I have pretty consistent lot to lot ammunition and never need go back to neck sizing.
    Blaser K95 Luxus Kipplaufbüchse .25-06Rem. Zeiss 8x56, 110gn Nosler Accubond = Game Over!

  4. #4
    In their almost recent reloading manual-they seem to come out with one every six months- Lyman has stated that after years and years (They pretty much invented it here in the US) of data collection and cartridge testing they have found that in most cases, neck sizing has little benefits when the cases are being used in a standard sporting chamber and no longer recommend it on the basis of case life nor accuracy. I FL resize all my ammo as I have multiple rifles in the same chamberings and must interchange ammo between rifles. My accuracy levels are never lacking.~Muir

  5. #5
    Quote Originally Posted by Muir View Post
    I FL resize all my ammo as I have multiple rifles in the same chamberings and must interchange ammo between rifles. My accuracy levels are never lacking.~Muir
    Does this apply to your Hornet as well ?

    Neil.

  6. #6
    Quote Originally Posted by Hornet 6 View Post
    Does this apply to your Hornet as well ?

    Neil.
    Nope. That is one of my exceptions.~Muir

  7. #7
    Quote Originally Posted by Muir View Post
    Nope. That is one of my exceptions.~Muir
    I suspected, but decided to check anyway

    Neil.

  8. #8
    Yes, I F/L my 6.5 and others peoples - somehow it seems to shoot better, however on my little tac I prefer to N/K and only use the F/L die after annealing

  9. #9
    Always full length resized, no issues and as has been mentioned you can use it in other chambers of the same cal. New brass is no exception, had a chat with a guy the other day and he doesn't FL size new brass, just uses as is. Not best practice as far as I'm aware as you couldn't guarantee its dimensions.

  10. #10
    Quote Originally Posted by Moppy76 View Post
    Not best practice as far as I'm aware as you couldn't guarantee its dimensions.
    That's a bit like saying one shouldn't fire factory ammo in a rifle as you couldn't guarantee its dimensions.

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