Over all length

Discussion in 'Ammunition & Reloading' started by DavidB, Oct 9, 2013.

  1. DavidB

    DavidB New Member

    A few months back, y'all talked me into keeping my reloading equipment, setting it up and learning how to use it. So I did but now I have a question about the over all length. I am using two reloading manuals, (1) is mordern reloading, second edition by Richard Lee, (2) is Lyman 49th edition, In the Lee book, loading a 200 grain jacketed bullet the OAL is 1.595 using accurate #9 powder, the Lyman book shows 1.610 OAL, but does not list the specific projectile I purchased, or the powder. However, when I seat the bullet so the crimp is in the cannelure (which both books indicate is correct) I am getting an OAL of 1.5615. The Bullets I purchased say 44 mag, 200gr. F.M.C./F.M.J. , size .429 manufacured by Youngs Enterprises in Orange City Fl. Am I doing something wrong? I understand case pressure will increase if i set the bullet to deep, but the bullet cannelure makes the OAL shorter than the handbooks indicate.
  2. Axxe55

    Axxe55 The Apocalypse Is Coming.....

    i understand what you are seeing. not sure i can explain this so it makes sense, but i will try to.

    the OAL listed is many times the max length for the round to fit in a certain magazine size, sot it will feed properly. the OAL can vary slightly from book to book. some will use the max OAL and some will err on the shorter end.

    myself, i seat the bullet at the cannelure if it has one. now on some of my rifle loads, i will shallow seat the bullets. meaning, they are just shy of touching the barrel lands. in doing so, depending on the bullet used, i may have to fire that rifle like a single shot as they won't fit the magazine.

    yes you are correct that if seated too deeply, it can cause a pressure spike when fired, and possibly could be dangerous.

    IMO, i think the OAL you are getting is probably just fine.

  3. mseric

    mseric New Member

    OAL is always Bullet and firearm specific, not manual specific. Seat you bullets so they work with your bullet and with your firearm and forget what the manuals say. Then Start low and work up.
  4. gr8oldguy

    gr8oldguy New Member

    I use the manual as a guide. My true test is how the round chambers. If i'm setting up I'll load a dud and slowly seat the bullet until it passes the "ker-plunk" test. When I can drop that round in the chamber and have it drop freely in and fall freely out then I'll measure to check the OAL and compare that to the manual. Then I might make small adjustments. Works for me every time. good luck
  5. JW357

    JW357 New Member

    I'm not the most experienced reloader out there, but you're reloading for .44 Magnum, correct?

    Which means the finickiness of OAL isn't as prevalent as it is in semi-autos. (Unless you're shooting it in a Desert Eagle and not a revolver?)

    You can load them a little longer safely, I believe, so long as it isn't too long that it sticks out at all from the cylinder. Yes, seating the bullet too deep can cause a spike in pressure, although I have shot some pretty stupid rounds that I have loaded with no ill effects.

    In my limited knowledge, the OAL you're talking about should probably be fine.
  6. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

    Any bullet that says FMC (full metal case, no exposed lead) should be presumed to be a plated bullet. Use cast data