Page 1 of 2 12 LastLast
Results 1 to 15 of 16

Thread: Neck turning tool

  1. #1
    Join Date
    Feb 2014
    Location
    Argentina
    Posts
    8

    Neck turning tool

    First of all I apologize if this is not the subforum for the question, I did not find one related to reload.
    I bought a neck turning tool, sinclair nt 1000.
    I would like to know what thickness you leave at the neck, I think I just left it very thin ... 0.0075 inch

  2. #2
    Join Date
    Feb 2003
    Location
    Austin, Texas
    Posts
    893

    I turn...

    Quote Originally Posted by nueces5 View Post
    First of all I apologize if this is not the subforum for the question, I did not find one related to reload.
    I bought a neck turning tool, sinclair nt 1000.
    I would like to know what thickness you leave at the neck, I think I just left it very thin ... 0.0075 inch
    I turn mine to .0085. Thin, but not too thin. I've reloaded the brass many times since I'm a bench rest shooter and have had no trouble with with cracked or separated necks; yet this thin neck results in easy bullet seating with enough tension.

  3. #3
    Join Date
    Apr 2017
    Location
    DFW, TX
    Posts
    135

    It dependes upon several other dimensions

    1) What is the neck diameter of your gun?

    Assuming this is a 6 PPC, neck diameters generally run between 0.262" and 0.269".

    2) What is the diameter of your bullet?

    Assuming a 6mm bullet, this will nominally be 0.243". If your using a flat base bullet, you should consider the pressure ring at the base of the bullet. Many bullet makers, like BIB, publish the pressure ring diameter of their bullets. To be safe, I typically use 0.2434" as the bullet diameter in my calculations.

    3) How much clearance between the neck diameter of a loaded round and the chamber neck do you want?

    0.002" is a good average clearance number to shoot for. Some folks run as tight as 0.0015" and some a little looser but I personally would want to stay tighter than 0.003".

    So here's how the math flows. Let's assume your rifle chamber has a 0.262" neck. If you want 0.002" of clearance, then the neck diameter of a loaded round should be 0.260". If your bullet has a diameter of 0.2434", then the thickness of the neck, by difference, needs to be 0.0166". However, keep in mind this number is 2X the actual neck wall thickness. So dividing by 2 yields a desired neck thickness of 0.0083".

    So, depending upon all your other equipment specs, 0.0075" may be fine. However, I'm guessing that's thinner then need be. Hope this helps. Good luck!

  4. #4
    Join Date
    Apr 2017
    Location
    Ames, Iowa
    Posts
    468
    Depends upon the brand of brass and of course your intended use, but I'd suggest using a spark plug gap tool [the bladed kind] and set to .014 and turn until say 90% of the neck is cleaned up. Probably practice on some junk brass first.

  5. #5
    Join Date
    Feb 2003
    Location
    Tennessee
    Posts
    5,199
    Kyle pretty much nailed it! If you don't have a ball mic...get one.

  6. #6
    Join Date
    Feb 2014
    Location
    Argentina
    Posts
    8
    Thanks for the quick answers, I think I'll take some steps and ask again

  7. #7
    Join Date
    Feb 2003
    Location
    Texas
    Posts
    1,250

    Forum Search

    Quote Originally Posted by nueces5 View Post
    Thanks for the quick answers, I think I'll take some steps and ask again


    Just a suggestion, If you haven’t done so already. On the opening page of this forum, in the upper right hand corner there is a small window labeled ,"Advanced Search”

    Type in a related topic, Example, “Neck Wall Thickness”, hit the little magnifying glass symbol.

    You will likely find enough discussions/information to keep you busy for a while. You mention that you’re shooting a 1909 mauser in 7.65X54,(Argentine?) and a CZ 550 varmint in .308. Do a forum search for each rifle.

    As you know,you may also try other forums related to your search.

    Hope this helps.

    Glenn

  8. #8
    Join Date
    Feb 2014
    Location
    Argentina
    Posts
    8
    Quote Originally Posted by Chism G View Post
    Just a suggestion, If you haven’t done so already. On the opening page of this forum, in the upper right hand corner there is a small window labeled ,"Advanced Search”

    Type in a related topic, Example, “Neck Wall Thickness”, hit the little magnifying glass symbol.

    You will likely find enough discussions/information to keep you busy for a while. You mention that you’re shooting a 1909 mauser in 7.65X54,(Argentine?) and a CZ 550 varmint in .308. Do a forum search for each rifle.

    As you know,you may also try other forums related to your search.

    Hope this helps.

    Glenn
    I will do, thanks!!

  9. #9
    Join Date
    Oct 2019
    Posts
    28
    or post more specific info on the rifle and brass in use.
    even 8 is pretty thin for a production or mil surplus rifle

  10. #10
    Join Date
    Dec 2003
    Location
    washington.........STATE that is.
    Posts
    10,451
    Quote Originally Posted by nueces5 View Post
    First of all I apologize if this is not the subforum for the question, I did not find one related to reload.
    I bought a neck turning tool, sinclair nt 1000.
    I would like to know what thickness you leave at the neck, I think I just left it very thin ... 0.0075 inch
    May I suggest that when you're searching pay especial attention to WHY necks get turned and ask yourself "is neck turning appropriate for my application?" IMO you can make great use of neck turning but I _think_ possibly for different than the usual reasons. I think your use of neck turning will be to make better fitted brass by making custom-fitted necks via modifying other than stock cases to your rifle. For instance making your cases from 30-06 brass

  11. #11
    Join Date
    Jul 2005
    Posts
    520
    Quote Originally Posted by nueces5 View Post
    First of all I apologize if this is not the subforum for the question, I did not find one related to reload.
    I bought a neck turning tool, sinclair nt 1000.
    I would like to know what thickness you leave at the neck, I think I just left it very thin ... 0.0075 inch
    There are a couple of companies making neck thickness sorting tools using a dial indicator.
    Use a 'tenths indicator' (1/10,000 in graduations) for these small measurements.
    1/1,000 is not precise enough.

    I switched from BR to live varmints a long time ago.
    I use many of the same techniques.

    I have tight neck chambers cut and then make neck walls 0.0100 in.
    Before turning the necks to size (2 steps) I sort the brass by
    neck thickness runout (variation around the neck).
    I have measured case wall thicknesses and found a smaller neck
    runout matches up with the rest of the case well being more uniform.

    At 400+ yards even a groundhog is a small target.

    It can be sort of anticlimactic to spend 20 or 30 minutes setting up,
    and then taking one shot and waiting hours for the groundhogs to come back up.

    Bring a lot of cold water.

    Many of the critters have been shot over enough and dive as soon as they see a
    human outline a couple hundred yards away.
    So the shots have gotten even longer.

    Panda action, Jewell br trigger, right bolt, left port, Leupold 50mm scope with a power doubler.

    Gets it to about ~18X to 40x from a 6.5-20x50mm.
    Doubler lens touches at the bottom end.

    Very accurate in 6mm REM AI.

  12. #12
    Join Date
    Jul 2005
    Posts
    520
    And when neck tuning the final cut should not take off more than about 0.0005 in.
    It leaves a better finish.

  13. #13
    Join Date
    Feb 2014
    Location
    Argentina
    Posts
    8
    Take all your advice, take the measurements of external used cases, and internal neck diameter.
    I prefer to start by letting the tool only remove a small layer of brass. So they have been at 0.001
    I have reloaded them with the load that has given me the best result, and this Sunday we will see if we are lucky.

  14. #14
    Join Date
    Feb 2014
    Location
    Argentina
    Posts
    8
    Yes, I have, and I have read some posts that talked about this. The language difference limits me, since I speak Spanish, and I have to use the online translator.
    But with a little patience, I learn.

  15. #15
    Join Date
    Apr 2017
    Location
    Ames, Iowa
    Posts
    468
    I had my mandrel/s come n my NT-1000s I got rid of the Allen setscrew that "locks" the mandrel in place and replaced it with a 2 inch screw with a Philips head so I could could tighten it better. I wanted torx, but wasn't really into ordering 25 of them. The local machine shop supply place had Philips.

Posting Permissions

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