This old timer is dead wrong. Powder charge and bullet depth will beat out bullet runout/neck thicknessby a mile.

I have done extensive tests on the subject of runout. Ask Mossyoak33 on here how seriously I have taken it. I have found runout matters past .01"on big cartridges with alot of freebore. But if you are shooting 7mm08 and are .003" from the rifling, I found litterly almost no differnce up to .01" runout.

0.01" runout is huge. You can see this by rolling the cartridge.. by testing I would separate into batches different runout from 0 runout to .005" runout, to .010". My 300RUM, and 7mmSTW shot .7MOA groups with everything under .007" runout. Past that, I would get fliers and open up to 1.5MOA. I have a target 7mm08 with a very short neck, and I litterly got .5MOA with everything I put thru it.

My suggestion is to not go down the neck turning road. It can help with flyers. No doubt, but going down this road, you need to learn to anneal, and have quality concentricity gauges. For about2 years there, I turned reloading into work doing this.

But if youfind a good dynamic load, and yourgun is beddedproperly and solid, neckthickness matters very little.