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Lead bullets

Discussion in 'Reloading' started by Jeffbat83, Apr 1, 2011.

  1. Jeffbat83

    Jeffbat83

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    Mar 3, 2011
    Being only a few weeks into my reloading career, I have become very comfortable loading plated bullets in my G39 so far, no malfuctions at all. So I decided to buy a lonewolf barrel and see how it works out with lead bullets. I am wanting to know if it is common for a lead bullet to require an OAL shorter than is listed in a loading manual(Lyman #49). The bullet that I am currently working with is a MBC IDP #4-XD(200 gr rnfp). With my factory barrel, my lead rounds would clunk In and fall out freely without a problem at 1.08, but with my lone wolf barrel I am having to reduce them to about 1.07.

    If I'm missing any details let me know, thanks in advance.
     
  2. oneofthose

    oneofthose

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    May 16, 2007
    I'm no expert, hopefully others will chime in, but I believe the difference you describe between the glock factory barrel and the LW is not related to COL. The LW barrel is likely fully supported, and "tighter" than the Glock barrel.

    But I could be wrong. When you insert a loaded round as you describe above, and remove it, do you see lines from the rifling in the bullet?
     

    Last edited: Apr 1, 2011

  3. Colorado4Wheel

    Colorado4Wheel

    14,949
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    Nov 2, 2006
    CO
    Totally normal. I load my lead 9mm to 1.080 in a KKM barrel.
     
  4. Jeffbat83

    Jeffbat83

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    Mar 3, 2011
    thanks for the input, will take them to the range today and see how they workout.
     
  5. Three-Five-Seven

    Three-Five-Seven Señor Mombo Millennium Member

    2,727
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    Aug 8, 1999
    Great Southwest
    The difference you note is due to leade (deliberately misspelled).

    Leade is the distance between the end of the chamber and the beginning of the rifling. This varies from barrel to barrel and is the primary reason for suggesting people "work up" loads, rather than taking the maximum listed load and assuming it will operate in a normal pressure range.

    Automatic pistol cartridges headspace on the case mouth. However, the bullet ogive can encounter the rifling before the case is fully seated in some barrels (chambers). That's why the bullet needs to be set-back for some guns and not others.

    Glocks, in particular, have a very generous leade so the pistol will continue to operate when hot and dirty. Target barrels have no such requirement and, therefore, often have a shorter throat (leade) to enhance accuracy. These require a "shorter" round -- one where the bullet ogive is moved back to permit chambering.

    Hope this makes sense and is helpful.
     
    Last edited: Apr 1, 2011
  6. That is the correct answer. I have the same issue with a new LWD 45 ACP barrel with my truncated cone lead bullet loads. Nothing wrong with the LWD barrel but I sent it back to LWD with a couple of dummy loads with my bullet and they fixed it (I guess they opened the throat increasing the freebore) but they had it back to me so fast that when I called a few days after sending it was already on the way back and there was no record of what they had done to fix it. Works perfectly.
     
  7. fredj338

    fredj338

    21,931
    1,049
    Dec 22, 2004
    so.cal.
    Very common w/ LW bbls in any caliber. It further supports the OAL is very bullet & gun/bbl specific.
     
  8. Jeffbat83

    Jeffbat83

    27
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    Mar 3, 2011
    Well, no problems at the range, perhaps I am thinking too much, thanks for the help.
     
  9. Aquagear

    Aquagear

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    0
    Aug 29, 2010
    Sparks Nv.
    I have KKM barrels in both my 19 and 34, both require a shorter OAL than the stock Glock ones. I have had no problems, but I also do not run my loads any ware near max. If you are loading near maximum you need to be care full, with small case capacity pressures with shorter OAL can rise rapidly. Be cautious and watch for signs of excess pressure, it is advisable to back off on the powder charge by 10% and work back up. Shoot safe and you will shoot longer.