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Showing results for tags 'Accurate vernier calliper?'.
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I am just about to send my 223, 6BR and 308 FLS dies back to Forster to have their necks honed. This should make the dies work the brass less and hopefully give less expander ball induced runout. I have neck diameter measurements of bullet seated no neck turn Lapua brass of 0.2465", 0.268" and 0.336" respectively. To anyone that has taken these measurements, so they sound about right? I have two vernier calipers and they read about 2 thou different. I have decided to trust the most expensive and newest set, but before I irreversibly alter the dies would like some reassurance. I was going to ask Forster to hone 3 thou under my measurments to allow for 2 thou neck tension and 1 thou brass springback unless anyone can recommend different. Mine are all bolt guns, the BR will have a 0.272" neck chamber and the 223 & 308 have factory barrels. Can anyone offer any thoughts before I dive in?