“Making “Wolfgang
Results 1 to 5 of 5

Thread: .380 OAL question

  1. #1
    Rock
    Join Date
    Jul 07 2010
    Location
    Sacramento Co. California
    Posts
    18

    .380 OAL question

    I'm reloading for my bersa thunder, but having magazine issues.
    With my Lee press, I am seating 100 gr. flat point Extreme bullets at .980"
    seems as if a bullet which may be a bit longer will get "cocked" in the magazine and not rise to where it will get chambered
    as the slide comes forward.
    Most load data I find says to seat the bullet to .980"
    I am nervous about seating them to, say .975" .
    Any one have any suggestions.
    All of my magazines are genuine Bersa
    Thanks for your input

  2. #2
    Administrator gtgeorge's Avatar
    Join Date
    Apr 06 2011
    Location
    Deer woods of GA
    Posts
    6,435

    Re: .380 OAL question

    Being a flat nosed bullet usually means a shorter OAL. Load data is based obn the space occupied by the bullet inside the case as well as bullet weight. Are you using load data for a flat nose or HP bullet? If you supply your bullet OAL and powder you wish to use I will be glad to run the data through Quickload to see what afeects OAL will have. Also do you own a chronograph?
    Certified Armed Infidel .
    WARNING: All my ammo contains bacon grease for a one way ticket to hell!
    45/70 when Bacon is still on the hoof. Here Piggie Piggie and ISIS pigs.



  3. #3
    Rock
    Join Date
    Jul 07 2010
    Location
    Sacramento Co. California
    Posts
    18

    Re: .380 OAL question

    Thank for your response
    The load data I am using is for a 100 gr bullet, as I found in Modern reloading by Richard Lee, and have never seen data for flat nosed bullets.
    My bullet length is .4305" Using win 231 powder, 3.0 gr.
    The gun is in the shop for a check-up, and the gunsmith suggested that the OAL with the flat nose is too long for the mag and the "corner" of the nose is hanging up in the mag.
    I do find that Remington. JHP ammo measures about .956", but didn't know if seating that short was proper.
    I do not have access to a chronograph.
    Thanks for any input.

  4. #4
    Administrator gtgeorge's Avatar
    Join Date
    Apr 06 2011
    Location
    Deer woods of GA
    Posts
    6,435

    Re: .380 OAL question

    3.0gr looks very safe with that bullet length seated even as short as .900 within quickload. So you should be safe seating to whatever feeds well. And of course your chrony readings will help confirm during the normal workup. I will look up the Lee data and compare the bullet lengths referenced and then generate the QL data for your use.
    Certified Armed Infidel .
    WARNING: All my ammo contains bacon grease for a one way ticket to hell!
    45/70 when Bacon is still on the hoof. Here Piggie Piggie and ISIS pigs.



  5. #5
    Administrator gtgeorge's Avatar
    Join Date
    Apr 06 2011
    Location
    Deer woods of GA
    Posts
    6,435

    Re: .380 OAL question

    I did not see any data for a 100gr with 231 in Lee's manual so I pulled the LD in Hornady for a 100gr FMJ that the bullet length is .501 and ran the data through QL. It matched Hornady's velocity within 5% so I then modified it to reflect your shorter bullet and seating to a depth to occupy the same case volume and generated the data. You may want to measure your case water volume to match the data completely but the standard info was used.

    For extra security I would start at one of the lower loads and verify accross the chrony to work up.

    QuickLOAD-380 100gr FN win231.pdf
    Certified Armed Infidel .
    WARNING: All my ammo contains bacon grease for a one way ticket to hell!
    45/70 when Bacon is still on the hoof. Here Piggie Piggie and ISIS pigs.



Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •