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.223 brass case mouth too large.

Discussion in 'Handloading and Reloading' started by kainronin, Dec 21, 2011.

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  1. kainronin

    kainronin Member

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    I am new to rifle reloading. I bought 1k proccessed brass to reload and I found out the case mouth is too open. When I put a bullet in it for the seating die, the bullets just falls to the bottom of the case. Is the brass unuseable? Should I send it back? I wish I just got unproccessed brass because the brass that I proccess, the bullet fits in nicely.
     
  2. rcmodel

    rcmodel Member in memoriam

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    It hasn't been FL sized yet.

    "Processed" brass just means it has had the range rocks and spiders chased out of it, deprimed, cleaned, and the primer crimp removed.

    You still have to resize it yourself before reloading it.

    rc
     
  3. kainronin

    kainronin Member

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    You are right, thanks alot! That is why I am glad I came to this site so I can get advice from experienced loaders.
     
  4. Hondo 60

    Hondo 60 Member

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    When processing rifle brass you also have to measure the length & trim to the correct size.
    According to Lyman's 49th Reloading Manual the "Trim to" length for 223 is 1.750.

    If you don't trim you run the risk of a case being too long & jamming in to lands.
    This can cause a serious over pressurization.
    With possibly catastrophic results.

    Please, if you don't have a manual or three - get some.

    Stay safe!
     
  5. kainronin

    kainronin Member

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    Thanks, but I did trim to the correct length.I just recently bought a Hornady case trimmer and RCBS prep center for rifle brass. I have been reloading handgun for awhile now, but just started rifle. I got these 75gr AMAX loaded for my first .223 rounds. They will not fit in an AR-15 with the COAL so you have to single shoot them. I heard they are pretty accurate so we will see how they shoot tomorrow.
     

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  6. kainronin

    kainronin Member

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    Oh, and I have a Hornady,Speer, Sierra, and Lynman manuals, all current editions. When I first got into reloading, I wanted to be precise and not blow myself up. I have been reloading now for about six months.. I have not had one problem out of my 9mm,40SW,.44Mag,and .45auto so hopefully my rifle ones will be just as good :).
     
  7. kainronin

    kainronin Member

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    Correction,They will not fit in an AR-15 magazine.
     
  8. medalguy
    • Contributing Member

    medalguy Member

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    From the pic posted the OAL is too long. Check with your manual for max OAL.
     
  9. kingmt

    kingmt Member

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    Did you trim before or after sizing?
     
  10. Hit_Factor

    Hit_Factor Member

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    Sizing will normally make the case longer, so I trim after sizing. However, you can trim before sizing by triming a little shorter. Measure after sizing and adjust you pre-sizing trim length accordingly.

    Remember, 1.75 is a goal and there is plus or minus variance allowed. Your reloading manual will tell you what the variance is.
     
  11. steve4102

    steve4102 Member

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    That's the 75gr A-Max, it has to be loaded long to keep the ogive out of the neck. Hornady lists an OAL of 2.390" and must be loaded single shot in an AR. I'm guessing that is what his OAL is.
     
  12. snuffy

    snuffy Member

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    kainronin, You gave no clue as to what sort of .223 rifle these would be fired in. That long 75 grain bullet will need a minimum of 1-7 rate of twist to stabilize it. You can still shoot them in whatever you have, but they would hit sideways in a 1-12 twist, and make a slot, (not a clean round hole), in a target with 1-9 twist.

    Yeah FL resize, THEN trim.
     
  13. rcmodel

    rcmodel Member in memoriam

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    Not if you trimmed before sizing them..

    After FL sizing, they will grow longer, and not every one will grow the same.
    Trimming before FL sizing is just a shot in the dark as to how much they well grow when sized.

    Suggest you FL size them all, then trim them all again to 1.750".

    rc
     
  14. kainronin

    kainronin Member

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    I did trim..and I do know about the bullets..
     
  15. kainronin

    kainronin Member

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    2.390 is the COAL the Hornady manual recommends and I have them seated to that. I know about twist rates. My Rock River AR has a 1-7 twist rate so it will stabilze them fine. I did trim to the correct length after I resized them myself. This is why I waited a little while before I started rifle, I knew it was different than handgun reloading.
     
  16. kelbro

    kelbro Member

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    Hornady also makes a 75gr that will fit AR mags and shoots very well even in 1:9 barrels.
     
  17. Hit_Factor

    Hit_Factor Member

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    I have had good accuracy with the 69 grain Sierra Match King in my 1:7 RRA NM. They fit in the magazine. Using Varget for Rattle Battle type matches.
     
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