Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: Case prep questions

  1. #1

    Case prep questions

    Hope someone can point me in the right direction as I'm puzzled with this one.
    I cleaned, sonic tumbler, 30 Norma cases which have been fired in my rifle a couple of times, de capped, cleaned out primer pocket & dried.
    Before I progressed any further I attempted to chamber them in the rifle they were fired in - 4 were very tight closing the bolt & 2 were impossible to close the bolt?
    Case OAL is the same as the others that do chamber easy & I can't see anything obvious
    Any ideas?
    Wingy
    unless you can prove it beyond all reasonable doubt, it wasn't me. If you can prove it then you must be mistaken

  2. #2
    I recommend that you full length resize your cases and then check the trim length. Regards JCS

  3. #3
    Quote Originally Posted by jcampbellsmith View Post
    I recommend that you full length resize your cases and then check the trim length. Regards JCS
    May sound silly but I thought I was full length resizing them when I de capped them.
    As I'm reasonably new to this I bought a 3 die set, 1. De caps and I thought full length resized? Not so sure now,
    2. Seats the bullet 3. Crimps
    How do I tell the difference between neck sizing & full length sizing dies ?
    The set I have is Lee in a red case.
    Wingy

  4. #4
    Quote Originally Posted by Wingy View Post
    May sound silly but I thought I was full length resizing them when I de capped them.
    As I'm reasonably new to this I bought a 3 die set, 1. De caps and I thought full length resized? Not so sure now,
    2. Seats the bullet 3. Crimps
    How do I tell the difference between neck sizing & full length sizing dies ?
    The set I have is Lee in a red case.
    Wingy
    the die will say on the side either FL or NS
    if you are using a FL die you need to adjust it more so it does its job,just a little at a time until the tight brass chambers nicely,you can buy gauges to measure the shoulder bump from stoney point there called head space gauges,
    Last edited by see it shoot it; 15-10-2013 at 11:12.

  5. #5
    Quote Originally Posted by see it shoot it View Post
    the die will say on the side either FL or NS
    if you are using a FL die you need to adjust it more so it does its job, just a little at a time until the tight brass chambers nicely,you can buy gauges to measure the shoulder bump from stoney point there called head space gauges,
    +1. I put a Tippex mark on the thread/locking ring so I can keep a close eye on the die as I screw the die in a fraction at a time. When I am setting up the die, I try one case in the die, if it doesn't chamber, I adjust the die again and pick a fresh case to resize. I repeat the process with fresh cases until I am happy the die is set correctly, I then resize the samples that failed to chamber.

    http://www.hornady.com/store/Headspace-Gauge-Kits/

    I have in the past screwed up by resizing too much (~8 thou) and this became apparent when the primers on the fired cases started to back out of the primer pockets.

    Have fun.

    JCS
    Last edited by jcampbellsmith; 15-10-2013 at 11:29.

  6. #6
    Just checked my dies none have FL or NS? What I have are:-
    1) de cap and seizing
    "LEE - 243 - G1

    2) bullet seating
    "LEE - 243 - J1

    3) crimping
    "LEE - 243 WIN - G1
    Wingy

  7. #7
    does die no.1 have a nut on the top?
    if so it is a FL sizer

    In general run the die down onto the extended press ram and appropriate shell holder until it stops, back off the ram and give it 1/8-1/4 turn more (Lee says 1/4-1/3, i prefer slightly less for longevity)
    raise ram and you will feel it "cam over" to a stop
    tighten collar



    http://leeprecision.com/cgi-data/instruct/RM3508.pdf

    more worrying is why fireformed brass from the same rifle with less or more sizing will not chamber?
    did you run them through once? if you run them through twice on a standard FL die design you can cause neck/shoulder bulges as the expander ball pushed the neck it as it tries to go back in an already sized case


    Last edited by bewsher500; 15-10-2013 at 13:10.

  8. #8
    Quote Originally Posted by bewsher500 View Post
    does die no.1 have a nut on the top?
    if so it is a FL sizer

    In general run the die down onto the extended press ram and appropriate shell holder until it stops, back off the ram and give it 1/8-1/4 turn more (Lee says 1/4-1/3, i prefer slightly less for longevity)
    raise ram and you will feel it "cam over" to a stop
    tighten collar



    http://leeprecision.com/cgi-data/instruct/RM3508.pdf

    more worrying is why fireformed brass from the same rifle with less or more sizing will not chamber?
    did you run them through once? if you run them through twice on a standard FL die design you can cause neck/shoulder bulges as the expander ball pushed the neck it as it tries to go back in an already sized case


    Cheers for that it is the set as per the link & it is a FL seizing die. Some of brass was done twice, although sprayed with a small amount of Hornaday one shot lube some were very tight in the press when de capping. I ran these a second or third time which made them easier in the press.
    May be this has caused the problem as you describe, but there is nothing obvious on inspection, not chambering "fireformed" brass is what had me puzzled.
    Is there any way of correcting this problem?
    Cheers Wingy

  9. #9
    Quote Originally Posted by Wingy View Post
    Is there any way of correcting this problem?
    Sadly those with shoulder bulges may be goosed!
    You can try resizing them further but on the Lee die you run out of adjustment (its what makes them easier to set up in that you can't bump shoulders back too far)

    this is an extreme example: (note the ring on the shoulder


  10. #10
    Thanks for the info, it's not as obvious as the photo you posted but I think this is what I've done.
    Still lots to learn
    Wingy

Similar Threads

  1. Wanted case prep station
    By jonny.c in forum Ammunition, Reloading & Ballistics
    Replies: 16
    Last Post: 28-08-2014, 18:32
  2. Wanted Case prep station
    By GGG in forum Reloading
    Replies: 1
    Last Post: 05-10-2013, 13:48
  3. For Sale 1967spud Case prep services
    By 1967spud in forum Reloading
    Replies: 16
    Last Post: 17-10-2012, 16:27
  4. Case prep for ackley improved
    By PKL in forum Ammunition, Reloading & Ballistics
    Replies: 9
    Last Post: 27-08-2011, 04:37
  5. Case prep
    By PKL in forum Ammunition, Reloading & Ballistics
    Replies: 2
    Last Post: 31-01-2011, 20:30

Posting Permissions

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