Are you using an Adj gas block?

[keystone183]

The best way to approach adjustable gas is away from the port, like Savage did with the MSR-10 using a cylinder in the block, as opposed to a set screw over the port.

The problem with choking the port and increased erosion is that you end up chasing your port erosion with more choke, especially on softer steels like many stainless barrels are made from.

Since Grendel has such low working pressure from the start, I doubt you'll see rapid erosion on RLGS, but on MLGS and CLGS, it will happen faster, especially if the port is too large from the start.

Another problem with adjustable gas is carbon-welding, which has been really problematic for me using the set screw designs.

It would be interesting to do a length borescope analysis series of checks over a long round count, looking at port erosion between 2 different barrels of the same make, one choked, the other not.

Still not clear on the forces that are causing increased erosion when you have an adjustable block? Do you get faster erosion if you have a smaller dia gas port, all other factors of a barrel being equal?

Agree that the borescope analysis would be interesting, to put some hard data to it. I suspect that 99% of users never see this issue. I wonder if the useful life of the barrel might go before it became an issue.

As for carbon welding, i had at least 1000 rounds (more, but i can't guess at how many) through an SLR and when i swapped barrels a few months ago.....not even a smidge of resistance.... Excellent product.