Best Concentricity gauge

[Stix]

Im about to/want to buy a concentricity gauge for checking my reloads...

Thought id ask you guys your opinions of which one to get...are there better ones, worse, less/more versatile ones etc.

Keen to hear peoples advice...

Thanks in advance,
Stix.

[marksman]

if you only want one the neco is it, it is the only one that can check for banana bending cases that I know of that works
http://www.neconos.com/item/Concentrici ... t-Gauge-12

if you are a casual shooter with factory chambers who wants an improvement in reloads
http://www.ebay.com.au/itm/Hornady-Lock ... 2362353293

the neco's is IMHO the rolls royce but for tight match chambers that don't have a bulge mark
with the hornady the bulge mark of a factory chamber don't matter, it does work
there are plenty of others that say they work but from experience I know they do not
sorry that's harsh, they don't work as well as these

[brett1868]

I've got the Hornady version of the below 2 units along with a Neco Case Gauge that I use on the big rounds. If using the Foster Co-Ax press with a decent set of dies then adjusting concentricity takes minimal effort. Might add that adjusting concentricity is pointless unless the neck of the case has been uniformed by turning it.

https://www.hornady.com/reloading/precision-measuring/precision-tools-and-gauges/lock-n-load-concentricity-tool

http://brtshooterssupply.com.au/products/forster-cartridge-case-inspect.html

http://www.neconos.com/details.htm

[marksman]

[quote="brett1868"] Might add that adjusting concentricity is pointless unless the neck of the case has been uniformed by turning it.

I agree with that to get the most out of bushing die's as you are working the outside of the neck and you would be making the inside not concentric if not uniformed
but if you use a collet die and you check concentricy from the projectile of your loaded round it makes no difference as you work the inside of the neck making the inside concentric

[brett1868]

By not neck turning the case you can only get concentricity on 2 out of the 3 circles, being the case and neck but not necessarily concentric to the throat / bore if that makes more sense.

One of the great features of the Neco gauge is the ability to measure the case wall thickness and you'd be surprised just how much it can vary even with brand new Lapua brass. I measured mine and used a Dremel to notch the rim at the thinnest point so I can chamber the round with the notch in the came position. Cases will "Banana" in the chamber when fired due to differing case stretch which upsets projectile transition from neck to throat and by notching I'm adding a degree of uniformity to this effect. Probably outside the realm of care by most but thought I'd add it as yet another step to take when seeking precision.

[marksman]

ya know Brett
it makes me all warm and fuzzy inside to know I am not the only bloke with a fetish for precision
this obsession can be a bit embarrassing sometime's
good onya mate

I have to say a bit more about banana shaped cases though
it does not make any difference if you have bad banana cases when you have multiple locking lugs, more than two lugs that surround the bolt face

[Stix]

Thanks Guys...

[Stix]

ya know Brett
it makes me all warm and fuzzy inside to know I am not the only bloke with a fetish for precision
this obsession can be a bit embarrassing sometime's
good onya mate

I have to say a bit more about banana shaped cases though
it does not make any difference if you have bad banana cases when you have multiple locking lugs, more than two lugs that surround the bolt face

As professor Julius Sumner Miller said..."Why is it so...?"...or as everyone's favorite chip lady Pauline said..."please explain...?"
Is tit something to do with &/or rely on a fire formed case supported by shoulder of chamber & a bolt face that cannot move with 3 points of contact from the lugs...? (does my question make sense...?)

[marksman]

the banana shape comes from one side of the case being thicker than the other and having more elasticity, hence the shape, one side will stretch more than the other, especially under pressure, the really bad cases will never be straight even after full length sizing
you cant fix it like neck turning that uniforms the neck,
when the rifle fires there is expansion where there is no support from lugs (two lug bolt) the case can bend, as explained by Brett in his post above
if you index your cases with a concentricity gauge and notch/mark the case to place it in the same every time this should not happen,
or just get rid of the really bad ones all cases are effected to some degree
if you have multiple locking lugs that cover all the way around the bolt sharing the load it does not matter, as explained by David Tubb in his sierra reloading vid
this David Tubb video is IMHO very good for the reloader looking for precision, Utube has taken it down, copy right

so there you go, I'm happy to embarrass myself with stuff most reloaders would think, hmmm not for me

[Stix]

if you only want one the neco is it, it is the only one that can check for banana bending cases that I know of that works
http://www.neconos.com/item/Concentrici ... t-Gauge-12

if you are a casual shooter with factory chambers who wants an improvement in reloads
http://www.ebay.com.au/itm/Hornady-Lock ... 2362353293

the neco's is IMHO the rolls royce but for tight match chambers that don't have a bulge mark
with the hornady the bulge mark of a factory chamber don't matter, it does work
there are plenty of others that say they work but from experience I know they do not
sorry that's harsh, they don't work as well as these

I've got the Hornady version of the below 2 units along with a Neco Case Gauge that I use on the big rounds. If using the Foster Co-Ax press with a decent set of dies then adjusting concentricity takes minimal effort. Might add that adjusting concentricity is pointless unless the neck of the case has been uniformed by turning it.

https://www.hornady.com/reloading/precision-measuring/precision-tools-and-gauges/lock-n-load-concentricity-tool

http://brtshooterssupply.com.au/products/forster-cartridge-case-inspect.html

http://www.neconos.com/details.htm

So at this point im only using factory chambers & a hunter/target shooter wanting to improve accuracy with my handloads. So i had the thought of trying such a gauge thinking (hoping) at this point it may answer some of the unexpained fliers etc. But that said, i will eventually move on & up, & am a firm believer in crying only once...(like all of us here, i have wasted so much money on utter crap that has proven useless, so i dont want to do it again).--so im happy to pay more now & not have to buy one again...
Im really pushed for time to research as i have to leave tomorrow morning, so wanted to order it before i leave, so it might be here when i get back...hence asking the questions...

Do you guys have any experience with the 21st Century one that BRT sell...?...is that one in the mix also...?--i noticed no mention of it & just wondered if there was a reason for that...

Thanks guys...

[winton]

Guys
How much more accuracy can you squeeze out of a load from attending to concentricity of the case?