concentricity gauge

A

accumark

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Vancouver Island B.C.
I am in the process of looking for a concentricity gauge I am wondering who has them and which ones you have, as well as all reviews good and bad also does anyone know where I can get an H&H industries concentricity gauge Thanks in Advance Jim.
 
These are nice quality am eyeing one myself..

h ttp://www.brownells.com/reloading/measuring-tools/concentricity-gauges/sinclair-concentricity-gauge-prod37479.aspx?dym=y
 
I have the 'LOCK-N-LOAD' Concentricity Tool that's put out by Hornady. It's the only one I've ever had so I'm not able to compare to anything else.



Easy to use and seems to work well.
 
Biggest drawback is that you can only measure the concentricity of loaded rounds. You are unable to determine if you are losing concentricity sizing or seating. Using the Sinclair type you can measure runout of fire cases, sized cases, or loaded rounds.

Johnn Peterson said:
I have the 'LOCK-N-LOAD' Concentricity Tool that's put out by Hornady. It's the only one I've ever had so I'm not able to compare to anything else.



Easy to use and seems to work well.
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wapitiwhacker said:
Biggest drawback is that you can only measure the concentricity of loaded rounds. You are unable to determine if you are losing concentricity sizing or seating. Using the Sinclair type you can measure runout of fire cases, sized cases, or loaded rounds.
Click to expand...

did some reading and seems the hornady can stress the neck tension is this true? tying to get the best load I can.
 
I made my own.
Terry


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accumark said:
did some reading and seems the hornady can stress the neck tension is this true? tying to get the best load I can.
Click to expand...

Put it this way. The way you straighten a round with the Hornaday gauge is by capturing both ends of the round and pushing sideways on the case neck with a plunger. If you have to do this 4 or 5 times to eliminate runout it is akin to wiggling the bullet back and forth in the neck. IMHO it has to "stretch" the brass every time you push it sideways. Stretch may be an exaggeration but it illustrates the point. If you are using very little neck tension how much wiggling would it take to change it? I have no data to back it up, and have no idea how much it actually effects neck tension, so again, just my humble opinion.
 
I use the Hornady one as well...

I'd probably get the RCBS unit if I had to do it over again but I don't use a concentricity gauge nearly as much as I thought I would anyway...
 
wapitiwhacker said:
Put it this way. The way you straighten a round with the Hornaday gauge is by capturing both ends of the round and pushing sideways on the case neck with a plunger. If you have to do this 4 or 5 times to eliminate runout it is akin to wiggling the bullet back and forth in the neck. IMHO it has to "stretch" the brass every time you push it sideways. Stretch may be an exaggeration but it illustrates the point. If you are using very little neck tension how much wiggling would it take to change it? I have no data to back it up, and have no idea how much it actually effects neck tension, so again, just my humble opinion.
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I would ask the question if the intended goal of accuracy is achieved. leaving the loaded round with runout vs having little to no runout, but having lost neck tension in comparison to other rounds. I would think that using the Hornady tool as a measuring device and segregating loaded rounds by the amount of force required to properly align the bullet in the case may be an option. like you, I feel testing is necessary.
 
sharp shooter said:
Does the Sinclair one correct run out as well or does it just identify it?
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It only measures run out, it does not correct it. Where it is helpful is using it through our loading process to identify where you may have a problem. From there you change procedures, setup or tools to fix your issue. I think one is better to go this route as opposed to continue loading with excessive runout and just push the bullets straight afterwards.
 
dfrombc said:
It only measures run out, it does not correct it. Where it is helpful is using it through our loading process to identify where you may have a problem. From there you change procedures, setup or tools to fix your issue. I think one is better to go this route as opposed to continue loading with excessive runout and just push the bullets straight afterwards.
Click to expand...

I agree with that. But what if your runout happens while seating. I guess it shouldn't if you trim correctly. I would like to get a better trimmer.
Steve
 
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