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.

DPT Alpine


User Tag List

+ Reply to Thread
Page 2 of 2 FirstFirst 12
Results 16 to 20 of 20
Like Tree5Likes

Thread: Do you always need to case trim?

  1. #16
    Member Cyclops's Avatar
    Join Date
    Mar 2014
    Location
    In the Mainland
    Posts
    936
    I haven't yet trimmed.
    I've Norma 223 cases that are on their 7th load and Lapua Palma 308 cases on their 6th load without trimming (or annealing).
    223 cases have only been neck sized. 308 cases have been neck sized and full length sized.

  2. #17
    Almost literate. veitnamcam's Avatar
    Join Date
    Dec 2011
    Location
    Nelson
    Posts
    24,972
    I would trim all cases after first firing just enough to get them all the same length and possibly cull any very short cases.....eg FC brass.

    Overall case length and how that relates to the chambers maximum length depends on the reamer used in that rifle and is nothing to do with headspace or jump to lands.

    I personally would mark brass and size for each rifle as required.

    If brass is to be used in two different rifles with the same load then basicly you are going to have to size and trim for the tightest chamber which WILL stretch your brass in the looser one and cause these cases to grow lengthwise and if the difference is more than a little case head separation is inevitable.
    Cyclops likes this.
    "Hunting and fishing" fucking over licenced firearms owners since ages ago.

    308Win One chambering to rule them all.

  3. #18
    Gone But Not Forgotten
    Join Date
    Feb 2014
    Location
    Taupo
    Posts
    1,887
    I use Sinclair chamber length gauges, have for over thirty years. They're inexpensive and give an accurate reading. You'll need calipers though.

    https://www.youtube.com/watch?v=JKnXJxaAw2U
    zimmer likes this.

  4. #19
    Member zimmer's Avatar
    Join Date
    Oct 2012
    Location
    Waikato
    Posts
    4,986
    Quote Originally Posted by 10-Ring View Post
    I use Sinclair chamber length gauges, have for over thirty years. They're inexpensive and give an accurate reading. You'll need calipers though.

    https://www.youtube.com/watch?v=JKnXJxaAw2U
    +1 Ditto, and the reamer drawings. Have 5 of them. Made the last one myself out of brass though rather than go to Sinclairs - I had nothing else I wanted off them at the time and the shipping would have been shit.

  5. #20
    Member
    Join Date
    Feb 2017
    Posts
    27
    I trim every firing. I neck turn my cases before the first firing and use Redding bushing dies to get consistent neck tension and low ES. If the cases are not all exactly the same neck length there will be variety between cases, so I trim to just over book max length. Yes, the difference from one case to another is tiny, but it's all about eliminating tiny differences and they all add up. My last load of .300 WM reloads had an ES of 4fps over 5 shots.

    I also think it's important to use a good trimmer that supports the case well. I use an LE Wilson jobby.

 

 

Similar Threads

  1. 6.5 x 55 minimum trim to length?
    By WillB in forum Reloading and Ballistics
    Replies: 10
    Last Post: 07-02-2017, 09:31 AM
  2. Importing quick trim dies
    By Ryan_Songhurst in forum Reloading and Ballistics
    Replies: 8
    Last Post: 15-05-2016, 09:02 AM
  3. Outboard motor trim
    By Munsey in forum Outdoor Transport
    Replies: 24
    Last Post: 22-09-2015, 02:09 PM
  4. Lee Quick trim bodies for sale anywhere?
    By steven in forum Reloading and Ballistics
    Replies: 2
    Last Post: 05-10-2013, 09:32 PM

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!!