Originally Posted by DoubleRadius
One seldom-mentioned accuracy secret with the .22-250 (or the AI version) is to use .308 brass rather than .22-250 brass. Why? most .22-250 brass measures just 0.464" ahead of the groove and thus is a rather loose fit in most factory chambers. OTOH .308 brass is often between 0.467" to 0.469" at the same location. This centers the case better and usually eliminates any unsightly case bulge (depending on the chamber dimensions of course). You will probably have to turn necks depending on your chamber neck diameter, which means you will have fitted case necks - another plus for accuracy.

A bit to a lot more work, but the result is better case alignment, usually a bit better accuracy, and longer case life.



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Please explain your entire sequence for this process...inquiring minds & all that $hit....