11-11-2020, 02:28 AM
.264 LBC-AR made by Les Baer always used a .136 bolt face depth since he started out using AA-licensed 6.5 Grendel bolts and actual Grendel chambers.
You can headspace it how you want, but .136 face depth will have a stronger extractor lip.
The ".264 LBC chamber does not exist in any industry standard with a published chamber drawing that Im aware of.
The .264 LBC-AR is a chamber specifically made for Les Baer with a tighter .295 neck and a conventional freebore optimized for the 123gr SMK.
Les Baer also contracted Black Hills ammunition to produce a factory Black Hills 123gr SMK load, which was pretty warm.
Given the proven design of the actual Grendel bolt and extractor and the market support for that, it only makes sense to go with a .136 bolt face depth, 2.810 long Grendel bolt of reputable origin.
The misnomer that .264 LBC is correspondent with a .125 bolt face depth is simply not accurate.
You can headspace it how you want, but .136 face depth will have a stronger extractor lip.
The ".264 LBC chamber does not exist in any industry standard with a published chamber drawing that Im aware of.
The .264 LBC-AR is a chamber specifically made for Les Baer with a tighter .295 neck and a conventional freebore optimized for the 123gr SMK.
Les Baer also contracted Black Hills ammunition to produce a factory Black Hills 123gr SMK load, which was pretty warm.
Given the proven design of the actual Grendel bolt and extractor and the market support for that, it only makes sense to go with a .136 bolt face depth, 2.810 long Grendel bolt of reputable origin.
The misnomer that .264 LBC is correspondent with a .125 bolt face depth is simply not accurate.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com