Correct OAL?

Discussion in 'The Ammo & Reloading Forum' started by The_Vigilante, Jul 11, 2008.

  1. The_Vigilante

    The_Vigilante New Member

    Joined:
    Apr 28, 2008
    Messages:
    123
    Location:
    El Paso, Texas
    Hopefully some of you who have been reloading longer than I
    have can help me with a question of COL/OAL. I started reloading
    some .45 ACP using Hi-Skor 700x (5g) and 200g Lasercast RN
    bullets. According to Lee's 2nd Edition of Modern Reloading a
    minimum OAL for 200g lead bullets is shown of 1.170. When I tried seating the bullets at that length they appeared to be too far down in the case and wouldn't taper crimp properly. I then seated them to 1.275 OAL (Max OAL) and then taper crimped them using Lee's Crimping die. So where should
    have I set the proper OAL for these Lasercast bullets? Thanks for
    any help and suggestions.
  2. artabr

    artabr New Member

    Joined:
    Mar 3, 2008
    Messages:
    7,859
    Location:
    New Iberia, Louisiana
    Vigilante, I think 1.170" is to deep for a round nose bullet. I think you need to check your data. I would be willing to bet that your data is for a semi-wadcutter style bullet. 200 grain lead round nose data is kinda sparse. I would say about 1.275" would be better. Even better than taking anybodies advice, would be to call the maker. Ask what the O.A.L. is for their bullet. Trust me, they will be more than happy to help you. Also ask if they have any data they can send you.

    http://www.laser-cast.com/ContactUs.html

    Post back and let me know how it turned out. :)


    Art
    Last edited: Jul 12, 2008
  3. LDBennett

    LDBennett Well-Known Member

    Joined:
    Dec 20, 2003
    Messages:
    6,555
    Location:
    Hesperia, CA
    The_Vigilante:

    When in doubt about the seating depth there are a few basics that need consideration.

    The first is that when the bullets are seated deep the pressures developed by firing such a round are greater than when the bulet is seated long. So error towards the Max OAL.

    Bullets can be thought of being made up of sections. The center is a straight cylinder. The nose is usually a rounded cone. The tail can be nonexistent (flat base) or a reverse tapered cone (boat tail) or a rounded surface (most cast bullets, to allow easy entry into the case during reloading).

    Where the cyclinder meets the rounded cone is the point that you do NOT want to go inside the case. If the supplied OAL puts the rounded cone inside the case then that stated OAL is WRONG. It is also WRONG if too little of the cylinder and tail sections are inside the case because the case will have too loose of a grip on the bullet and it is likely to move under recoil or mere handling of the ammo.


    So look your bullet over and decide what makes sense. Don't blindly follow the generic dimensions listed in the reloading manual that are for bullets that don't even look like yours. If you want to use only documented OAL data search out a manual that covers your exact bullet. I looked in about 5 different manuals and a 200 gr RN cast bullet is a rarity, apparently, and I found no data for it. Laser-Cast would most certainly have such data. OR apply the rules above.

    LDBennett
  4. The_Vigilante

    The_Vigilante New Member

    Joined:
    Apr 28, 2008
    Messages:
    123
    Location:
    El Paso, Texas
    LDBennett and Artabr,

    Your comments and suggestions are appreciated. I did reseat to 1.275 after finding 1.170 too deep. I also emailed Lasercast for the recommended OAL. Although I didn't find any data for the 200g RN, I did find data for the 230g RN which puts the OAL at around 1.275 so that is what I will go with until I hear from Lasercast.
  5. Popgunner

    Popgunner New Member

    Joined:
    Dec 3, 2005
    Messages:
    1,764
    Rather than stab around in the dark why not use the load data for Lasercast bullets? Oregon Trail Bullet Co-makers of the Lasercast line puts out a nice manual to go along with their bullets. Different bullets even though they're the same weight won't always have the same OAL.

    Remember that it's not just the overall length you need to consider. You first need to know the length that the cases were that the manual is using. For 45acp in the Lasercast manual the case length is called out to be .898 inches. If your cases are a different length then your case mouth will be at a different spot on the bullet when it's seated to the length called for in the manual. If you have cases that are .898" you would want to seat the 200 grain SWC Lasercast bullet to 1.250" OAL. (to my knowledge Lasecast doesn't make a 45 cal 200 gr roundnose.)

    The Lasercast manual calls for 4.4 grains of 700x for the start load using WLP primers. Max is only 5.4 gr.

    For the 45acp you'll want to make sure your cases are very close to the .898" figure.
    Last edited: Jul 12, 2008
  6. The_Vigilante

    The_Vigilante New Member

    Joined:
    Apr 28, 2008
    Messages:
    123
    Location:
    El Paso, Texas
    Popgunner,

    Check out the following link and you will find that they now do make a RN 200g bullet: http://www.laser-cast.com/45Cal.html. I don't think the SWC and the RN would have the same OAL but then I may be wrong. Apparently this bullet must not be covered in their manual. I found no mention of a manual on their website but did email them and got some load data on selected bullets but not the RN 200g 45ACP. As indicated I did email them and hope to hear something on Monday.
  7. Popgunner

    Popgunner New Member

    Joined:
    Dec 3, 2005
    Messages:
    1,764
    Those must be newer bullets. They're not shown in the first edition manual. In the first edition manual all their bullets are seated to the same OAL. It would be wise to check with them though.
  8. JLA

    JLA Well-Known Member

    Joined:
    Feb 26, 2007
    Messages:
    18,267
    Location:
    Heart Of Texas
    seat them just shallow of the ring on the bullet where the bearing surface starts, start at min. charge and work up. this should allow you to still apply a taper crimp. the only problem with using max OAL with laser cast bullets is that laser cast casts their bullets large ( .452 instead of the recommended .451 ) for the .45 ACP, and in some barrels the bullet ogive will stick inside the throat if max OAL is used. i have been using laser-cast 230gr. RN for nearly 2 yrs without problems, as long as i seat them deep enough...
  9. The_Vigilante

    The_Vigilante New Member

    Joined:
    Apr 28, 2008
    Messages:
    123
    Location:
    El Paso, Texas
    JLA,

    Thanks for the info. Do you happen to know what OAL you are using?
  10. JLA

    JLA Well-Known Member

    Joined:
    Feb 26, 2007
    Messages:
    18,267
    Location:
    Heart Of Texas
    1.235" with laser-cast 230gr RN
  11. The_Vigilante

    The_Vigilante New Member

    Joined:
    Apr 28, 2008
    Messages:
    123
    Location:
    El Paso, Texas
    I received a reply from Oregon Trail recommending an OAL of 1.250/1.260. Thanks for all of your comments and suggestions.
Similar Threads
Forum Title Date
The Ammo & Reloading Forum My 45 auto reloads are not chambering correctly! GRrrrrr Oct 3, 2012
The Ammo & Reloading Forum iver&johnson 38, what is correct ammo. May 1, 2011
The Ammo & Reloading Forum Correct overall legnth? Apr 14, 2010
The Ammo & Reloading Forum What is correct 357 Mag bullet size? Jun 22, 2009
The Ammo & Reloading Forum Correct 9mm round? Jan 2, 2009

Share This Page