Neck thickness checker???

Gunneegoogoo

Gunneegoogoo

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Hi all....

I'm almost complete in terms of a full neck turning setup.

The only thing that I think I need now is something to measure neck thickness. A Mitutoyo ball mic is 4-500$ (OUCH!!), so is a Starrett. Sinclair has one for 230USD.

I stumbled across the Neilson "Neck Checker". Does anyone have any experience with this?? It looks like it's functional for both neck thickness measurements, as well as neck concentricity.

Any thoughts??

Thanks,

-J.
 
You could always seat a bullet, and use a micrometer to measure the resulting neck OD with the bullet seated. Then subtract the bullet diameter and divide by two for the neck thickness. By measuring at several points, you can see if the neck thickness is uniform.
 
stubblejumper said:
You could always seat a bullet, and use a micrometer to measure the resulting neck OD with the bullet seated. Then subtract the bullet diameter and divide by two for the neck thickness. By measuring at several points, you can see if the neck thickness is uniform.
Click to expand...

This is how I do it, simply and easy and uses the tools I already paid for
 
I picked up an RCBS Case Master off the EE & it's awesome! Haven't used it specifically to measure neck thickness, but it certainly could.

h ttp://www.rcbs.com/Products/Case-Preparation/Measuring-Tools/Case-Master®-Gauging-Tool.aspx
 
I picked up a Chinese ball-mic from eBay for $30 or so. I brought it to work and tried it against precision ground gauge blocks and it measured everything within a couple tenths so I said good enough for my purposes. Of course I've also gotten garbage Chinese measuring tools before so it's a gamble. The one I have has no brand name anywhere on it and the box is equally blank.

Lyman has a ball-mic for case neck thickness measuring for US$56 as well.
 
if your running factory brass in a factory chamber then all you want to do is set the cutter to skim the thin side of the neck and remove material from the thick side, cutting all the way around for a factory chamber could and can be to much, but for improving or removing run out or creating even neck pressure when neck sizing only you just want to uniform the necks without removing any serious amounts of material.

On the other hand if you have a 6ppc with a .262 neck and your using 220 russian brass then your going to want to neck turn 3 or four times to remove major material in order to just get the case to fit into the chamber, in this case see the above post or invest in some serious tools
 
I'm running Lapua brass in the 6.5x47 and the .338LM, and Nosler in the .300WSM. It's all annealed, trimmed, flashhole deburred, primer pocket uniformed, FL resized and bumped .001, and will be seated within .001 of what I think is the ideal COAL. I have jewellers scale that I'm going to play with to see if it matters over and above my chargemaster.

The 6.5 and .338 are custom guns, the T3 is factory.

-J.
 
I just picked up a Mitutoya MI-115-313 tube mic for 176. Not the fancy digital one though. I also have a RCBS case master. They run hand and hand. They little dial indicator is dead on. I also use the one that came with my K-M neck turning kit. They all run the same. I think RCBS has a tubing mic also around 56 US.
 
Gunneegoogoo said:
I'm running Lapua brass in the 6.5x47 and the .338LM, and Nosler in the .300WSM. It's all annealed, trimmed, flashhole deburred, primer pocket uniformed, FL resized and bumped .001, and will be seated within .001 of what I think is the ideal COAL. I have jewellers scale that I'm going to play with to see if it matters over and above my chargemaster.

The 6.5 and .338 are custom guns, the T3 is factory.

-J.
Click to expand...

measure a loaded unfired round at the neck, and then measure a fired case to see how much the neck swells, a bullet should drop in a fired case with little to no friction, if there is resistance then skim turn the brass. Lapua is pretty uniform for thickness, cant say for the nosler. some of my hand held neck turners have micrometers on the depth adjustment, slide the cutter to the stud and zero it, then adjust out from there and the dial tells you where your at, measure more then once to make sure that all of your tools are reading the same and then have at her, neck turning is really a lot of fun............okay that last part was sarcasm
 
Check this one .... $125 CDN

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sometimes avail at x-reload, or at Sinclair
 
silverfoxdj said:
I'd have to shoot much better than I do to justify one of these lol
Click to expand...

these tools will also rule out the shooter............maybe your a better shooter then your aware of but budget minded reloading tools are holding you back from your full potential???

Was trouble shooting a fellow that could shoot one zinger group out of 14 attempts, turns out his forster shoulder bump die was seating VLD bullets plus or minus 18 thou, seated bullets with my dies and his rifle never shot so good, but he saved a few bucks buying forster over redding and then cost himself a few hundred burning powder and winging bullets only to find out the weak link was his seating die............
 
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