I have built 3 grendel uppers.
1st with 20" barrel 5r nitride fluted from Classic Firearms. Fail short chamber, classic would do nothing not even contact back.
2nd 18" Balistic Advantage, not great accuracy with 123black, a couple of hand loads get 1moa.
3rd 20" Faxon heavy flute, had rough chamber that scratched brass bad. Waiting for replacement.
Just found the forum
1st with 20" barrel 5r nitride fluted from Classic Firearms. Fail short chamber, classic would do nothing not even contact back.
2nd 18" Balistic Advantage, not great accuracy with 123black, a couple of hand loads get 1moa.
3rd 20" Faxon heavy flute, had rough chamber that scratched brass bad. Waiting for replacement.
Just found the forum
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