I mostly use necked down 6.5 CM brass. Mostly LR, it just works and my Criterion barrel is plenty accurate, well sub MOA.
It produces 3040 fps with Hornardy 103 ELDXs at 22". Currently its in a Savage action set up for "paddock" shooting on a farm where we shoot reds of crop (starting after the roar). For that I like something with a bit of reach, and its certainly capable of that, I recently made the Eric Cortina 1MOA 600 cold bore challenge. But its gonna get the NV on it for crop shooting, and mostly it'll be under 250M shots.
To further confound ya. I just acquired a Kimber 308 (Hunter pro chopped to 17") and was fully intending to fit the 6CM barrel to it with one of @robhughes-games switchlugs. This is very doable as the 84M has a tiny barrel shank that will accept practically any donor barrel. However my donor is shooting astoundingly well closer to 0.5 MOA than 1.0, so altering it might not be a great idea.
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