Gear Review: Bruno Concentricity-Checking Tool

German Salazar has posted an informative article about concentricity-checking tools on his Rifleman’s Journal Blog. In that article, German provides a detailed review of the impressive new Bruno Concentricity Checker which features a high-grade dial indicator and an innovative system for holding both loaded cartridges and empty brass in place during the measurement process. German gives the Bruno tool high marks and it is now his favored concentricity gauge, replacing on older Sinclair tool (also reviewed in the article).

German writes: “When measuring a seated bullet, the Bruno [tool] is simple and intuitive in use: adjust the length of the tip holder, set up the indicator to bear on the ogive and get to it. I usually slip a Sinclair hex nut comparator over a bullet to make a faint mark right at the ogive to help me in determining where to set the indicator. I then set the indicator tip about 0.010″ behind the mark so that I am definitely on the bearing surface even if some of the bullets have a bit of variance. It’s a handy way to get set up consistently from one session to another.”

German continues: “Reading an empty case requires a little more effort, but not much…. Once the case mouth is smooth, the readings are in line with those of the Sinclair tool, although easier to read to a fine level of precision due to the finer gradations on the indicator and its horizontal mounting. The Bruno tool has become my principal tool for checking the concentricity resulting from different die setups and for comparing the results of one loading process to another. I simply have more confidence in my ability to get an accurate reading from it. After many years of service, I’ve decided to retire the old Sinclair and make the Bruno tool my primary concentricity tool. It is simply a better made, easier-to-use, more accurate tool and those are the qualities I value in any tool.”