Thread: 257R Experiences

Originally Posted by Mathias

Ignition failure still or not forming shoulder on first firing?

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Have necked up to 270 from 6mm then to 257, no problem with WW and Norma brass, good primer strike, just the R/P brass not achieving good primer strike, 40% failure, will get there in the end. Getting excellent accuracy while fire-forming using the old 95 Bergers moli-coated. 15 shots in 25mm, too scared to show it in the 3 shot group thread.