03-03-2018, 04:08 AM
I see. Well heres my best advice for building a single shot(gas-less) grendel AR that extracts well(or .223 for that matter)
1) Works smooothest when bolt and barrel are a factory matched set. This lets the bolt rotate easier during extraction. I have hypothized that if using a non-matched set, you could lap in the bolt/chamber interface, but have never tried myself.
2) You really need a side-charging upper. I have used a Gibbs and a BCA. The side charger really allows you to perform a clean, continuous, firm pull to to extract.
3) Loads. light to moderate loads will extract much easier. If using hot loads extraction will be difficult, even with the tips above performed. I have two good nodes with a few loads, but typically use the lower one for this reason.
1) Works smooothest when bolt and barrel are a factory matched set. This lets the bolt rotate easier during extraction. I have hypothized that if using a non-matched set, you could lap in the bolt/chamber interface, but have never tried myself.
2) You really need a side-charging upper. I have used a Gibbs and a BCA. The side charger really allows you to perform a clean, continuous, firm pull to to extract.
3) Loads. light to moderate loads will extract much easier. If using hot loads extraction will be difficult, even with the tips above performed. I have two good nodes with a few loads, but typically use the lower one for this reason.