New Brass

Discussion in 'Reloading' started by 300 ultra, Jan 2, 2011.

  1. 300 ultra

    300 ultra Well-Known Member

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    I purchased some new winchester brass and I had to trim well below minimum book trim length to square up. Is there issues with doing this? It is 30-06 brass. Is this common with winchester brass? Should I have just left it and fired it and then trimmed after firing? Appreciate replies...
     
  2. D.ID

    D.ID Well-Known Member

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    I frequently have to start my brass short in order to get uniformity which I need for flash hole deburring, chamfering and consistent neck tension. Shouldn't hurt anything. I have never had any trouble from it but as case grow I trim accordingly to let them grow out.
     
  3. Aldon

    Aldon Well-Known Member

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    I just had similar situation with new Remington Brass for .280

    Rule of thumb is that minimum necessary is neck length = to bullet diameter.

    While I would prefer long enough to trim and prep and have more than enough....as long as I get that value, in this case .284 neck length or greater I am OK.

    Edited.....

    For your case, .308 length would be your minimal aim....my recent experience was with 7mm thus .284.
     
    Last edited: Jan 3, 2011
  4. Kevin Thomas

    Kevin Thomas Well-Known Member

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    300 Ultra,

    You mention "well below minimum" but you didn't specify exactly what that may be. If it's a matter of .015"-.020" or so, that's not likely to be any problem at all. What is the final length you're coming up with when the brass is completely uniformed?

    Seriously doubt that this will cause you any problems, but would like to know what sort of dimension you're dealing with here.
     
  5. 300 ultra

    300 ultra Well-Known Member

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    The final trim length was .023 below minimum book trim length.
     
  6. sp6x6

    sp6x6 Well-Known Member

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    Barnes used to put a note in w/bullets saying set a minimum of 1/3 the diameter I think.Anybody remember this?OR WAS THAT 2/3 sorry, ?
     
  7. MTBULLET

    MTBULLET Well-Known Member

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    I've found It to be very common with Winchester lately, I have had up to 8% defective rate with win. brass in .223/.308/22-250/9mm, etc. Case mouth deformation, flash hole not punched, No primer pocket, deformed (folded) shoulders, etc. Called cust. service, asked me to send samples back, I did, they sent me a "coupon" for $10.00 and said " sorry". In my business, an 8%+ failure rate is unheard of !
     
  8. Kevin Thomas

    Kevin Thomas Well-Known Member

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    At .023" under, I wouldn't sweat it a bit. You'll be fine here, just monitor them as they lengthen, but you should have some time before you need to trim again.