Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Terminator Ammo Direct


User Tag List

+ Reply to Thread
Results 1 to 7 of 7
Like Tree11Likes
  • 1 Post By Michael B
  • 3 Post By zimmer
  • 2 Post By PERRISCICABA
  • 2 Post By Frogfeatures
  • 2 Post By Marty Henry
  • 1 Post By Carlsen Highway

Thread: How safe is old loading data?

  1. #1
    Member
    Join Date
    Aug 2015
    Location
    Taranaki
    Posts
    7

    How safe is old loading data?

    For the last 15 years my shooting has been confined to the range rather than the field. Recently I was asked to help in culling a small mob of goats for a friend. The terrain is fairly open where shooting ranges will be around 100 meters at least and the only suitable rifle I have for the task right now is my .243 Win, so I dug out some hand loads from the back of my ammo cupboard.

    The label on the boxes show these were loaded in 1998 and 37 grains of ADI AR 2208 powder was loaded under a 100 grain Hornaby BTSP projectile.

    This morning I took my small ring Mauser action .243 to the range to check the sighting. As the 100 meter range is undergoing some construction I was reduced to shooting at 50 meters. As I was setting up I thought I should check a ballistics chart to see where point of impact should be at 50 meters for a 180 meter zero. First I went to the ADI on-line loading chart to get the velocity on my smartphone before running the ballistics app.

    I was shocked to see that the maximum powder charge of AR 2208 in the .243 is now listed at only 33.7 grains.

    Despite having shot at least 50 of these hand loads through this rifle when they were first loaded, with no issues, I decided not to shoot and to go home and check my loading reference books. In the 1998 era ADI Reloading Handbook I used at the time 37 grains of AR 2208 is listed as the maximum but still safe load in this calibre. Furthermore the handbook stated the power is similar in burning rate to IMR 4064 and my loading handbook from the same era lists 37.5 grains of this powder as a maximum load.

    I realise that powder manufacturers will make small changes to powders over the years which will possibly result in altering loading data. I also realise that the maximum loads may have been reduced for safety reasons at some time. My question is:

    Would it be considered safe to continue shooting these loads, put together with data from when this batch of powder was manufactured, or would it be wiser to dump them and start again?

    I have tried to extract the powder this afternoon using a bullet puller, but out of the 5 cartridges I have tried 3 took more than 150 hits against a 50mm block of wood held on a concrete surface to separate and the remaining two and hardly moved after more than 200 hits. If these loads are unsafe I will end up dumping the remaining 55 or so and getting new cases, an unexpected cost!

    Any advice would be welcome.
    Bagheera likes this.

  2. #2
    Member zimmer's Avatar
    Join Date
    Oct 2012
    Location
    Waikato
    Posts
    4,986
    Put them in your seating die and seat them maybe 20 thou/0.5mm deeper. This will break the seal that forms with age. You should then be able to strip them with your inertia puller.
    Maca49, Beaker and Michael B like this.

  3. #3
    Member
    Join Date
    Apr 2014
    Location
    Invercargill
    Posts
    1,772
    Just a thought, if your loads are from 1998 your powder will be equivalent to data from that time also, so, in my humble opinion, i think it is safe to shoot.
    Remember, some us still shooting surplus ammo from "many" years ago.

    Thank you for your time, hope it help.

    Mac
    steven and Micky Duck like this.

  4. #4
    Bah, humbug ! Frogfeatures's Avatar
    Join Date
    Nov 2013
    Location
    Auckland, until I can escape south....to Southland.
    Posts
    1,665
    My pet load for 243 uses 37gr of 2208
    As the possibility of law suits increased, over the years, powder manufacturers built in a 'safety margin'
    Nick Harvey's original manual, compared to latter ones, makes interesting reading.
    veitnamcam and Beaker like this.
    He nui to ngaromanga, he iti to putanga.

    You depart with mighty boasts, but you come back having done little.
    Sounds like a typical hunting trip !

  5. #5
    Member Marty Henry's Avatar
    Join Date
    Oct 2014
    Location
    Tararua
    Posts
    7,047
    They still claim 2208 is an "equivalent" for 4064. Recalling comments from similar threads reducing loads could be the fear of US litigation. Looking in my hogdon manual they now list 36.5 gr for 4064 and a 100gr, and the oldest book I have (Lyman 1964) lists 39gr of 4064 as max for the 100 grain.
    I came across some 308 I'd loaded nearly 18 years ago last year 186gr lapua miras over 43gr of 4064 they shot fine back then and still shot ok when I burned them off to reclaim the cases. Looking in the modern books they are a "bit too hot" but Duponts suggested max was 45 back then.
    They were "safe" when you loaded so if they've been stored well I cant think of any reason not to use them.
    veitnamcam and PERRISCICABA like this.

  6. #6
    Almost literate. veitnamcam's Avatar
    Join Date
    Dec 2011
    Location
    Nelson
    Posts
    24,960
    If they were safe in your rifle when loaded I dont see why that would change.
    Perhaps work up again if you have new powder to reload tho batches can vary.
    "Hunting and fishing" fucking over licenced firearms owners since ages ago.

    308Win One chambering to rule them all.

  7. #7
    Banned
    Join Date
    Dec 2011
    Location
    Port Chalmers
    Posts
    753
    Shoot them and don't worry. Your 1998 data is for your 1998 powder.
    When you come to load some more ammo up, work up as if for a new load.
    PERRISCICABA likes this.

 

 

Similar Threads

  1. loading for the 243
    By northdude in forum Reloading and Ballistics
    Replies: 47
    Last Post: 14-03-2015, 07:35 AM
  2. Loading some 45/70 BP
    By Maca49 in forum Reloading and Ballistics
    Replies: 4
    Last Post: 23-11-2014, 10:38 PM
  3. Are you re-loading 30-30?
    By SiB in forum Reloading and Ballistics
    Replies: 2
    Last Post: 01-05-2013, 12:02 PM
  4. Anyone loading for the .243
    By moonhunt in forum Reloading and Ballistics
    Replies: 21
    Last Post: 14-08-2012, 08:46 AM

Tags for this Thread

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
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!