2011年5月3日 · The Hornady Lock-N-Load Ammunition Concentricity Gage is the first tool on the market to both identify and eliminate bullet runout. Bullet runout can be caused by a number of different variables in the reloading process and can effect the accuracy of loaded ammunition.

2018年3月9日 · 'Concentricity' is a misnomer for and meaningless to ammo measure. It's very difficult to measure bullet run out in itself. But the v-block type run out gages provided for loaded ammo run out off seated bullets.

2022年12月31日 · It was suggested that I check the "concentricity gauge" with a Machinist Gauge Pin, I purchased one on EBay for $10, .9 x 3" approx. Try and buy one the size of your favorite round, you only need this tool once.

2014年8月2日 · Educate me as to the importance of bullet/brass concentricity. I have experienced great accuracy when I take the time to run every round through the gauge and shoot the groups from the rounds that are "round". Let me hear what you're doing to ensure concentricity. -Swede

2012年12月25日 · I already have the Sinclair concentricity gauge, and it works great. In my caliber---280 Ackley--I was only able to find the RCBS seater die in stock anywhere. Although the Nosler custom case necks show great concentricity of 1 thou or less after resizing, half the bullets show run out above 3 thou, even though I chamfer the mouths and use ...

2008年4月22日 · In the .22 and 6mm diameter range, it was decided that a maximum of .0003 in bullet jacket concentricity was the limit in order to shoot competitive small groups in a good bench-rest quality rifle by an experienced shooter. On the I.C.C. unit, .0003 is equal to about 15 deviation units on the meter scale as the bullet rotates.

2017年3月9日 · Loading for the 28 nosler and with new brass and the 195's concentricity of the brass and loaded rounds were perfect i checked every one of them and were .002 .001. after i fire formed by brass bumped the shoulders back .002 and cleaned them and got ready to load some more. i checked my brass and they were all under .001 concentricity using my ...

2018年7月24日 · After looking at the Hornady and the RCBS gauges I went with the Sinclair concentricity gauge which works extremely well. One piece of advise I was given is to get the dial gauge rather than the digital gauge. It is much easier to watch the needle move rather than watch LCD numbers go up and down. 21 Century also make a nice unit.

2022年3月21日 · Things I would rank above concentricity gauge are a top-end sizing die, SAC headspace comparator, and a pair of mics - ball anvil and outside. $270 for 100 Lapua cases hurts, but those would be more important than a tool to measure runout if you're using brass that you didn't pull new out of the box.

2018年5月10日 · If the neck to bullet concentricity is good (although it needn't be perfect), then the bullet will find good alignment in the throat and the case body and neck will have minimal influence. Let's not forget that the base of the case is supported by the bolt face or the extractor to a certain degree as well; this is yet another influence on ...