check PTG's website. I had seen awhile back a chart for the go/nogo gauges that showed what calibers each gauge was good for. I.E. the 22BR i have is good for ALL the BR family and my 6.5x47 is good for that and the 6x47. Midway may have one that will work. They have a few 6mm caliber AI. just not sure which would work for you
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