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Author Topic: Well, That Explains That  (Read 3744 times)

dracphelan

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Well, That Explains That
« on: October 26, 2008, 06:10:26 pm »
I've been having a problem reloading for 30-06. I taken about a 3 year break in reloading for the caliber when I sold my 30-06. I bought a replacement 30-06 a few months back. I was having a weird problem. When I tried to seat the bullets, I would end up with bulging case necks and sometimes have the jacket from the bullets scrape off. This is not something I had happen before. I tried measuring things to find what was going wrong, but my mother-in-law had knocked my calipers off my desk and I couldn't get them to zero.
So, I got a new set of calipers today and measured things. The bullets are .308 and the the case neck interior measurement is .296 after resizing.  :o
I am using the same dies I used before (Lee Deluxe Die Set). Anybody have any suggestions. I would have bought new dies, except that the only place local to me had no 30-06 dies (I was looking at RCBS). I'm hoping there is something else I can try.
« Last Edit: October 26, 2008, 06:14:12 pm by dracphelan »

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    Powderman

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    Re: Well, That Explains That
    « Reply #1 on: October 26, 2008, 06:23:10 pm »
    First, make sure you are using the right bullets, and that they are .308 in diameter.
    Second, how many times have you loaded that brass?  After the first firing, you should trim to length, chamfer and deburr.  After the 4th or 5th loading, inside neck reaming might help. 

    Cleaning the case necks will help tremendously.

    What kind of brass and bullet are you loading?
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    Dave R

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    Re: Well, That Explains That
    « Reply #2 on: October 26, 2008, 10:45:26 pm »
    There's also a chance that you are over-crimping.  Or, in other words, your die has lost its adjustment and is over-crimping the case before the bullet is fully seated.  I've done that before.  Check your die adjustment before you get too freaked.  You should not need any crimp for a bolt rifle.  If you're shooting a Garand, then you'll want a good crimp.

    Also, cases that are too long can cause over-crimp, too, just like Powderman says.  That's the same as if the die is set too low.

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    Re: Well, That Explains That
    « Reply #3 on: October 26, 2008, 11:38:40 pm »
    When you check it all out and get everything physically in spec., a suggestion:

    RCBS sells a small, and by that I mean tiny, tub of case neck lube. It's NOT the same stuff as sizing lube.  It's specifically meant to aid in seating bullets.  Some calibers have weak shoulders that collapse easily.  In those calibers it's a Godsend.

    It's a white powdery substance(exactly what escapes me at the moment) that you just barely dip the case neck in.  Slugs slide in very slick after that.

    You may want to hunt some up and try it out.
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    sqlbullet

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    Re: Well, That Explains That
    « Reply #4 on: October 27, 2008, 11:21:26 pm »
    Just measured some 300 win mag I sized a few days ago.  The are running about .300 out of RCBS dies.  296 seems small, but I don't think it is inherently the problem.

    I have add issues before with hard seating and shoulder set back.  Chamfer and debur the inside of the case mouth carefully after trimming to length.  That has always been the solution when I have had this problem.
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    Fred Garvin

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    Re: Well, That Explains That
    « Reply #5 on: October 28, 2008, 05:34:51 pm »
    On loads I crimp, I always do the bullet seating and crimping in 2 seperate steps. Also, take your dies apart and throughly clean them. I don't think builtup lube would cause this problen, but clean dies can't hurt. Good luck and keep us posted.

    dracphelan

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    Re: Well, That Explains That
    « Reply #6 on: October 28, 2008, 07:46:01 pm »
    Last night I took apart the dies and thoroughly cleaned them. I am now able to get the inside case neck dimension to .300. I will try to load a few rounds. I would try trimming some of the cases. But, my trimmer is stuck in the case.

    Oohrah

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    Re: Well, That Explains That
    « Reply #7 on: November 02, 2008, 04:13:30 am »
    Check the expander ball or plug for being undersized.  Chamfer
    case neck inside and out.   Yes die adjustment for crimping can
    also give ya fits as well a case lengths that are not uniform

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