Howdo I measure brass concentricity

[BoydAllen]

I have always cut my ejector springs down a little at a time until the cases just cleared the action as the bolt was cycled. Another approach might be to find a spring with smaller wire. I never leave ejector springs as they came from the factory. If you use a one piece die, that has been honed to the proper diameter so that the expander has just a slight amount of work to do, you can get some straightening of brass as it is sized.

 

[22BRGUY]

Just checked and Powder Valley has Lapua .222 brass at $56/100

 

[Triple Deuce]

22 BR Guy - Your right on. I am seeing a deformed neck on fired cases. Thanks for the insight.
BoydAllen - Yes, I may have had the expander ball not set correctly. I was having problems depriming and lengthened the expander slightly. Thanks for your wisdom. Sounds simple but being a newbe, I could have gone for quit a while scratching my head .

 

[CatShooter]

Cut the ejector spring to 0.95"-ish with a Dremel cut-off wheel, and the cases will fall in a small pile next to the rifle... without dented mouths!

 

[BoydAllen]

Triple Duce

Nobody is born knowing this stuff. One of the primary reasons that I post is for guys just like you.

 

[mgx1138]

Triple Deuce: Just for your own peace of mind, load the brass with the worst runout identically with an equal number with the least runout, take them to the range and shoot for group size, side-by-side. Bet you will see very little, if any difference, especially at 100 yards, and doubt at 200 yards either.

Actually .003" of total indicated runout is not bad in my book, more than that and I would agree it would start to be a concern, but at the shorter distances that the 222 is capable of, I've never seen it as a problem.

I also believe in seating the bullets incrementally, seat 1/3, rotate case 120 degrees, seat 1/3, repeat for final seating. I'm also one who believes that occassional runout is caused by a piece of defective brass, otherwise all 20 would have equally bad runout, as opposed to the usual 1 or 2 rounds that I may get out of 20 loaded. Minimal, or no runout with 222 Lapua brass, just a little more with Winchester, but not enough for me to worry about.

Using the Sinclair dial indicator concentricity gauge to check for R/O.

I agree with your assessment of effect on accuracy. I've done the experiment; even 5 thou runout still shoots X's at 600 yards. I do check the runout on the loaded rounds for my LR ammo though (600 and beyond).