Re: high power 6mm
That is a loaded question. I have a 6mm-284 and it does very well. That being said I have heard of guys taking a 7mm mag and necking it to 6mm along with a 270 wsm and necking it to 6mm. Just depends on your expectations of barrel life and what you really want to do with the cartridge. Personally the 6-284 is as big as I would go in a 6mm.
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