D
dion
Guest
Need advice: I shoot a 284 win. I'm looking for a concentricity gauge of good quality and percision. what one would you reccomend and why? ..... any suggestions would be helpful. Thanks
If you want to check loaded bullet concentricty then the one made by Sinclair would be the best deal.
New cases may not check very good.
A fired case before resizing should be darn near perfect.
Check the brass on the neck after sizing for concentricty.
Then after loading and seating the bullet check for final results on the bullet just north of the case mouth.
The reason for checking concentricty with each step is that it will give you an idea of where runout is being introduced.
Your goal should be 0.0015 runout and no more than 0.002 on the bullet just north of the case mouth.
You will get the best concentricty results using the Lee Collet Dies............
New cases may not check very good.
A fired case before resizing should be darn near perfect.
Check the brass on the neck after sizing for concentricty.
Then after loading and seating the bullet check for final results on the bullet just north of the case mouth.
The reason for checking concentricty with each step is that it will give you an idea of where runout is being introduced.
Your goal should be 0.0015 runout and no more than 0.002 on the bullet just north of the case mouth.
You will get the best concentricty results using the Lee Collet Dies............
Centerfire
Member
Just my 2 cents worth but I would look at www.neconos.com
I have 3 different units and each works a little better/worse depending on the size of your case.
Centerfire
I have 3 different units and each works a little better/worse depending on the size of your case.
Centerfire
coyotechet
Chet
Here is one that I made a few years ago and still using today.
And here is a link to a really nice one that works fast and accurate.
http://bulletin.accurateshooter.com/2012/07/new-wheel-drive-concentricity-gauge-from-accuracy-one/
Chet
And here is a link to a really nice one that works fast and accurate.
http://bulletin.accurateshooter.com/2012/07/new-wheel-drive-concentricity-gauge-from-accuracy-one/
Chet
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A
Andy Cross
Guest
Another point
Just another point in using a concentricity gauge to measure bullet and neck run out is one thing. Correcting it is quite another. In a previous thread it was discussed that force straightening the projectiles wasn't a good idea. Correcting the problem so that it didn't occur was the better choice. So the consensus is that knowing about the run out and where it is coming from does nothing unless you intend using the information to make the corrections.
Andy.
Just another point in using a concentricity gauge to measure bullet and neck run out is one thing. Correcting it is quite another. In a previous thread it was discussed that force straightening the projectiles wasn't a good idea. Correcting the problem so that it didn't occur was the better choice. So the consensus is that knowing about the run out and where it is coming from does nothing unless you intend using the information to make the corrections.
Andy.
Boyd Allen
Active member
I have some experience with using concentriciy gauges that are designed to straighten loaded ammo, and while I absolutely agree that these tools are best used to diagnose issues that are the primary cause of ammo runout, under certain conditions , straightening may work out, while in others it probably will not.
For thin necked cases with neck tension much less than factory ammo, and particularly when they are loaded with flat base bullets, that have significant pressure rings at their bases, one can do a limited amount of straightening. I have, in the past, done so, for an entire weekend benchrest match. To give a little more weight to this, I will mention that I believe that I have heard that no less a shooter than Lester Bruno has done the same, with a tool that he sells (has sold?)
A few years back, I was at a match at Visalia, and spoke with one of the better shooters that would come up from Southern California (I believe) and among other things, he showed me a small hand held tool that was made from hardwood, that was fitted with a test best type of indicator, with which he quickly checked, and if needed, straightened each loaded round. He had a habit of taking home wood, and was a force to be reckoned with in any match he entered.
Over a decade ago, when I was testing a very well made tool that Ron Hoehn sold, I tried to straighten some factory .220 Swift ammo, and found that it was probably not a good idea. In that test, I shot the same ammo, both as it came, and straightened, and could tell no difference on the target.
On the other hand, for my PPC, with a little practice, it was easy to make small corrections, without apparent damage to case necks.
I should add that none of this will save you from a missed condition, or being out of tune...but it may make you feel better if you prefer tinkering to studying conditions.
For thin necked cases with neck tension much less than factory ammo, and particularly when they are loaded with flat base bullets, that have significant pressure rings at their bases, one can do a limited amount of straightening. I have, in the past, done so, for an entire weekend benchrest match. To give a little more weight to this, I will mention that I believe that I have heard that no less a shooter than Lester Bruno has done the same, with a tool that he sells (has sold?)
A few years back, I was at a match at Visalia, and spoke with one of the better shooters that would come up from Southern California (I believe) and among other things, he showed me a small hand held tool that was made from hardwood, that was fitted with a test best type of indicator, with which he quickly checked, and if needed, straightened each loaded round. He had a habit of taking home wood, and was a force to be reckoned with in any match he entered.
Over a decade ago, when I was testing a very well made tool that Ron Hoehn sold, I tried to straighten some factory .220 Swift ammo, and found that it was probably not a good idea. In that test, I shot the same ammo, both as it came, and straightened, and could tell no difference on the target.
On the other hand, for my PPC, with a little practice, it was easy to make small corrections, without apparent damage to case necks.
I should add that none of this will save you from a missed condition, or being out of tune...but it may make you feel better if you prefer tinkering to studying conditions.
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I think the goal should be to not introduce runout that isn't there.
Avoid this by using quality brass and dies. Die setup in the press is also important. With the best parts and equipment using poor technique all is lost.
For the .284 Win I recommend Lee Collet dies for the best results.
Avoid this by using quality brass and dies. Die setup in the press is also important. With the best parts and equipment using poor technique all is lost.
For the .284 Win I recommend Lee Collet dies for the best results.