Concentricity gauge?

[TrxR]

Anyone here ever make there own concentricity gauge? If so any pics or suggestions?

Thanks

 

[butchlambert]

Concentric to what?

 

[TrxR]

I mean something like this.


http://www.sinclairintl.com/reloading-equipment/measuring-tools/concentricity-gauges/sinclair-concentricity-gage-with-dial-indicator-sku749007305-37479-70547.aspx?sku=749-007-305&ICID=s5067

 

[butchlambert]

Just copy the Sinclair. It would be easy to do. I do know a couple guys that did that and after a week or 2 they quit using them.

 

[TroyMN]

Here is a picture of mine. The gauge was from harbor freight $10-15 or so and stuff around the shop.

 

[xs hedspace]

I use a dial indicator on a bent 1/4" rod that goes into a 3/4" thick scrap of furniture grade plywood(12 ply), and a v block screwed down to the plywood base. Twist the rod and indicator up and back and forth for different calibers so the indicator rides on the bullet or neck. Need to have another block to keep the cartridge base in the same place, while you rotate the shell. For matches, I mark the high spot on the base, so I can use the .002-.003" runout shells for the short yardages(like 800 yds )