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Gunsmithing Smith with .243 LBC reamer.

Looking for a shop to re-barrel a CZ527 in .243lbc.
Thanks.
RonA
Just curious, does this offer substantial improvement over the 6mm ARC?
The ARC has the advantage of being a SAAMI cartridge, though supply is limited, it is a factory production cartridge.
They are both 6mm's based on the 6.5 grendel/.220 Russian case.
 
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I have a 6mm predator, that is the same as the 243lbc/6 Grendel/whatever else.

There is a tiny bit more case capacity vs the ARC, so there's that, but not a huge increase in performance. If you're into reloading, you might as well get the little extra. The factory support is nice though if you can't/won't reload.