Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Farron, Pete737, ramm, Thekitch, TeamC
62669 Registered Users
Top Posters
dogcatcher 83268
stxranchman 52093
RWH24 44568
rifleman 44268
BOBO the Clown 42730
bill oxner 41068
BMD 40619
Big Orn 37484
txshntr 34827
sig226fan (Rguns.com) 31414
facebook
Forum Stats
62669 Members
46 Forums
438372 Topics
6037703 Posts

Max Online: 16728 @ 03/25/12 08:51 AM
Topic Options
#6864757 - 08/22/17 07:50 AM Concentricity tool
Buzzsaw Offline
THF Celebrity

Registered: 06/29/11
Posts: 10300
Loc: Frisco, Texas
I have heard finished bullet run out/concentricity are very important to extra accuracy.

what's the best tool for measuring these?

also neck tension? I just FL size, trim if necessary, debur and use a VLD inside neck chamfer , then run a nylon brush through each neck before charging and seating.

what am I missing? I'm not a benchrest shooter but I love accuracy.

But I like to keep it simple and fast as possible
_________________________
"I ain't here for a long time, I'm here for a good time"
King George Strait



Top
#6864774 - 08/22/17 08:00 AM Re: Concentricity tool [Re: Buzzsaw]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 21806
Loc: Wolfe City, TX
Originally Posted By: Buzzsaw
what am I missing?


Are you using bushing FL dies? Are you bumping shoulders .002"-.003" from fired length?
_________________________

800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available

Top
#6864823 - 08/22/17 08:38 AM Re: Concentricity tool [Re: Buzzsaw]
Buzzsaw Offline
THF Celebrity

Registered: 06/29/11
Posts: 10300
Loc: Frisco, Texas
No bushing dies Jason, but I always bump shoulders back for easy bolt closing
_________________________
"I ain't here for a long time, I'm here for a good time"
King George Strait



Top
#6864868 - 08/22/17 09:21 AM Re: Concentricity tool [Re: Buzzsaw]
dee Offline
THF Trophy Hunter

Registered: 04/10/10
Posts: 5062
Loc: Red River way
I have the sinclair tool and it works great when I use it. I'll be honest and say that I rarely use it in general though.
_________________________
"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt

Top
#6864928 - 08/22/17 10:08 AM Re: Concentricity tool [Re: dee]
Judd Online   content


Registered: 01/22/09
Posts: 11414
Loc: Sachse, TX
Originally Posted By: dee
I have the sinclair tool and it works great when I use it. I'll be honest and say that I rarely use it in general though.


^^^^ this

Mine isn't Sinclair...I did use it recently when I necked down my 6 dasher fireformed brass to 22 (yes, I've built a 22 dasher) and I wanted to see if my process was messing up the neck concentricity. It confirmed I wasn't and back in the drawer it went.
_________________________
Originally Posted By: Phil Robertson
Don't let your ears hear what your eyes didn't see, and don't let your mouth say what your heart doesn't feel

Top
#6865031 - 08/22/17 11:30 AM Re: Concentricity tool [Re: dee]
JTPinTX Offline
Bird Dog

Registered: 04/01/15
Posts: 285
Loc: TX Panhandle
Originally Posted By: dee
I have the sinclair tool and it works great when I use it. I'll be honest and say that I rarely use it in general though.


Exactly the same for me.

Top
#6865116 - 08/22/17 12:38 PM Re: Concentricity tool [Re: Buzzsaw]
Buzzsaw Offline
THF Celebrity

Registered: 06/29/11
Posts: 10300
Loc: Frisco, Texas
good to know. I guess with todays great Competition seaters, these really help. I like the RCBS with the sleeve which holds the bullet as it seats. Reminds me of an OLD OLD die I used to use for my .222 back in the early 70's. cant remember the brand. It had the sleeve with the long shell holder.


It was a Vickerman Seater.
_________________________
"I ain't here for a long time, I'm here for a good time"
King George Strait



Top
#6865130 - 08/22/17 12:49 PM Re: Concentricity tool [Re: Buzzsaw]
blackcoal Online   content
THF Trophy Hunter

Registered: 01/19/12
Posts: 9087
Loc: 60 Mi North of DFW
My question is "Do you reload in a sterile dust free sealed room?" Getting pretty serious now...
_________________________
The Greatest Enemy of knowledge is not ignorance,
it is the illusion of knowledge.--Stephen Hawking

Top
#6865160 - 08/22/17 01:14 PM Re: Concentricity tool [Re: Buzzsaw]
Teal28 Offline
Extreme Tracker

Registered: 12/10/08
Posts: 3767
Loc: Hen House Tx
I have the RCBS concentricity gauge. It works well. Like others I don't use it as often as I did when I first got it.
Normally not much run out in my loads.

But I keep it because I like gadgets. grin


Edited by Teal28 (08/22/17 01:14 PM)
_________________________

Top
#6865345 - 08/22/17 04:13 PM Re: Concentricity tool [Re: blackcoal]
Buzzsaw Offline
THF Celebrity

Registered: 06/29/11
Posts: 10300
Loc: Frisco, Texas
Originally Posted By: blackcoal
My question is "Do you reload in a sterile dust free sealed room?" Getting pretty serious now...



heck yes
_________________________
"I ain't here for a long time, I'm here for a good time"
King George Strait



Top
#6865355 - 08/22/17 04:32 PM Re: Concentricity tool [Re: JTPinTX]
jeffbird Offline


Registered: 03/09/09
Posts: 2391
Originally Posted By: JTPinTX
Originally Posted By: dee
I have the sinclair tool and it works great when I use it. I'll be honest and say that I rarely use it in general though.


Exactly the same for me.


I use the same. I always use it when setting up a die. The sizing die is where the runout is most likely to occur and the easiest place to reduce runout.

It is a helpful piece of equipment.

Top
#6866996 - 08/24/17 07:10 AM Re: Concentricity tool [Re: Buzzsaw]
Ranch Dog Offline
Pro Tracker

Registered: 07/15/05
Posts: 1521
Loc: Cuero
Sinclair tool as well. Only use it when a problem is suspected or if I want to compare a technique, tool, or anything else.
_________________________

Top
#6869148 - 08/25/17 10:15 PM Re: Concentricity tool [Re: Buzzsaw]
cmorsch Offline
Pro Tracker

Registered: 08/16/11
Posts: 1574
Loc: Midlothian, TX
I use a Neco Concentricity Guage, Redding Case Neck Guage, K&M neck turning tool to make all necks uniform, then redding competition bushing dies with no expander ballor pin, and redding competition shell holders to adjust how much I bump the neck, and working on getting a induction annealer as well. VLD chamfer all necks and use a RCBS chargemaster in conjunction with a Sartorius Entris124-1S and omega trickler to discharge powder. You can chase accuracy only so far before you end up going off the deep end. At the end of the day get what makes you happy. I dont know how much difference alot of what I use makes, but if I can eliminate a variable in my reloading, then why not do so.


Edited by cmorsch (08/25/17 10:17 PM)

Top
#6871783 - 08/28/17 05:11 PM Re: Concentricity tool [Re: Buzzsaw]
cabosandinh Offline
Pro Tracker

Registered: 08/12/13
Posts: 1383
Loc: Dallas, TX
if you use quality bullets, brass (Lapua). and dies with bushing and micrometer like those from Redding
your loaded ammo will be pretty concentric

I use Hornady concentricity tool just to check once in a while

Top
#6873342 - 08/29/17 11:40 PM Re: Concentricity tool [Re: Buzzsaw]
jeffbird Offline


Registered: 03/09/09
Posts: 2391
Here are some quick and easy tips to reduce runout.

1. Remove the wire retaining snap spring that hold the shellholder in place on the ram.
Either use nothing, or use a rubber O-ring. O-rings can be purchased at auto parts stores for a few dollars for a pack.

2. When installing the sizing die, put a washer on top of the shellholder and gently apply upward pressue to the die and then tighten down the lock ring.
The upward pressure helps align the die in the threads.

3. Slightly loosen the ball sizing assembly so that it has a little bit of free play in it. This bit of play helps it self-align on the downstroke.

4. Use sleeve type seating dies. Forster invented them and Redding has a comparable one. I generally buy a basic Forster full length sizing die, but always spring for the sleeve type seater. For use with high bc bullets, remove the seating stem and make sure the tip is not hitting the inside of the stem. Forster and Redding sell stems for VLD's to correct the problem.


Top



© 2004-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide