Which concentricity gauge

Starting the bullet straight into the rifling of the barrel is essential for accurate shooting. The smallest improvements in your accuracy are worth every penny.

Concentricity Gauge. Specifications Weight: 4. Features Directional Drive Wheel pushes the cartridge or bullet into the stop for accurate repeatable readings with equal pressure. Concentricity gage RPG mini. Concentricity gage RPG Concentricity gage RPGP. Concentricity gage RPGR. Concentricity gage RPGS. Rotary unit PDE. Rotary unit PDE micro. Accessories for concentricty gages. The difference is the lateral placement of the roller blocks. This bullet axis location could be at the ogive, between the ogive and tip, or near the tip of the bullet.

When I compared fourteen single-stage reloading presses , I used the same distances for bullet runout measurement. From that article :. Using the case mouth as a datum point, the cartridges were measured at the same distances using the lathe DRO to get exact distances as shown on my notes sheet here:. For those tests, I measured runout near the ogive 0.

Again, the most important thing is consistently documented datum references for your measurements if you want to compare results. This tool works great and you can even correct for bullet runout if the runout is slight.

For the fourteen single-stage reloading press comparison I chucked up an L. Wilson case holder for their case trimming system in my Precision Matthews PMGT lathe, and dialed it in within 0. I then used an indicator to measure neck concentricity and bullet runout in a very similar way compared with the Sinclair Concentricity Gauge. It is however not feasible for most reloaders since ownership of a lathe is rare.

It also requires a lot of setup time, and ties up the lathe while the setup is being used for concentricity and runout checks. Enable Accessibility. Live Chat Live Chat. Facebook Instagram. Create an Account Login Create an Account. Cart 0. Description Learn We believe the Sinclair Concentricity Gauge is the easiest to use and most accurate gauge of its kind on the market.

Sinclair Concentricity Gauge Video. Sinclair Concentricity Gauge Instructions Articles. Click here for price! Add to Cart Online Only.