02-10-2016, 05:56 AM
Those bolts have been breaking left and right, since they used S7 tool steel.
Properly-made AR15 bolts will hold up to excessive amounts of firing. If the metallurgy is wrong, then they will break, no matter the caliber.
Actual Grendel bolts hold up so well that you don't have to worry about it. Some other attempts to make them by shops just getting into it have had various issues, especially the ones using .125" bolt face depth, as the extractor is now very weak due to the thicker rim of the case compared to the 5.56.
There are many different threads about the Relia-bolts breaking, and replacements breaking, on several other AR15 and gun forums. Customers were told that the metallurgy problem was fixed, and that later models should be trouble-free.
https://www.google.com/webhp?sourceid=ch...relia+bolt
NP3 is a very smooth coating that has been in the industry for decades, first seen with Robar Firearms.
Properly-made AR15 bolts will hold up to excessive amounts of firing. If the metallurgy is wrong, then they will break, no matter the caliber.
Actual Grendel bolts hold up so well that you don't have to worry about it. Some other attempts to make them by shops just getting into it have had various issues, especially the ones using .125" bolt face depth, as the extractor is now very weak due to the thicker rim of the case compared to the 5.56.
There are many different threads about the Relia-bolts breaking, and replacements breaking, on several other AR15 and gun forums. Customers were told that the metallurgy problem was fixed, and that later models should be trouble-free.
https://www.google.com/webhp?sourceid=ch...relia+bolt
NP3 is a very smooth coating that has been in the industry for decades, first seen with Robar Firearms.
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