Max rounds through a barrel

[lrgrendel]

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?

[LRRPF52]

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?

[bwaites]

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.

[m796rider]

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.

[NugginFutz]

+1

[LRRPF52]

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?

[lrgrendel]

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.