Concentricity Gauges

[BKExpress]

Who has experience using concentricity gauges for rifle ammo? I'm thinking about buying the Sinclair (link below). Thanks for the feedback.

Sinclair Concentricity Gage | Brownells

 

[BAZOOKa]

I am interested in hearing what people have to say on this too. I have been eying the Hornady gage as I have the Hornady trimmer on a base I made and they look to be made from the same base casting. I could just swap them in and out on the base I made.
In the middle of my bench on the back.

Any experience with the Hornady concentricity gage in particular?

 

[sloughfoot]

they are a great tool and a lot of tight chamber benchrest rifle shooters use them. They have little value in a factory chamber rifle.

if you chuck up your rounds in a drill and spin them and the bullet does not wobble, your ammo is good for any conceivable purpose.

 

[1$Chuck]

I recently picked up the sinclair gauge. Its pretty simple to use.

 

[Warsaw214]

Food for thought... Always Verify your measurement system... For example, if your drill isn't factory new it may have been over torqued at some point and chuck shaft may be bent.

 

[jurassicnarc]

I get stuff from Sinclair several times a year. I use the concentricity gauge for 223 up through 270, but can't see much difference in accuracy from 7mm up. Since it only takes a few seconds to check each round after seating, I pretty much use it all the time

 

[Yeah]

Despite the name that gauge from Sinclair measures runout, not concentricity. Concentricity measurement can't be accomplished with a single indicator.

I employ a concentricity gauge from Universal Punch as an R&D tool for the loading process. Check out new dies, chamber, brass lots, FF technique, etc.