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AA 24" Overwatch 1/9 twist.
I shoot ONLY 123 grain bullets at max pressures and velocities. I would probably call it a .5 to .75 MOA barrel. No idea who the manufacturer is.
Do all barrels last the same amount of rounds fired? And how far will my groups open up?
Will it be obvious?
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Since the Grendel operates at lower pressures, the throat, and consequently the barrel life is exceptional, easily out-lasting the .308 Winchester. I think Les Baer has claimed barrels lasting well past 20,000rds for accuracy life.
What do you mean by max pressure and velocities?
NRA Basic, Pistol, Rifle, Shotgun, RSO
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6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
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I shot more than 6000 rounds through my first Grendel before I swapped barrels, and it still shot sub MOA with its preferred loads. It was a button rifled barrel. I expect that a good cut rifled barrel will easily go 7-10,000 rounds before issues.
I think most barrels are at higher risk of damage from cleaning than from wearing out from shooting the cartridge.
You seek escape from pain. We seek the achievement of happiness. You exist for the sake of avoiding punishment. We exist for the sake of earning rewards. Threats will not make us function; fear is not our incentive. It is not death that we wish to avoid, but life that we wish to live. - John Galt
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bwaites Wrote:I think most barrels are at higher risk of damage from cleaning than from wearing out from shooting the cartridge.
Which is why I own a bunch of dirty guns... I used to clean obsessively after every range trip but I know better now.
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I did all my cleaning in the Army. We cleaned M16's and M4's so excessively, it bled over to my personal guns, so I don't even need to touch them. Just add lubrication and ammo, and blast away....right?
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
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LRRPF52 Wrote:Since the Grendel operates at lower pressures, the throat, and consequently the barrel life is exceptional, easily out-lasting the .308 Winchester. I think Les Baer has claimed barrels lasting well past 20,000rds for accuracy life.
What do you mean by max pressure and velocities?
I use 30 grains of AA 2520 which is at or slightly above "book" value depending on which source you use.
For my given equipment, components and local conditions I have determined I am at the safest highest velocity hence also my max pressure.
