Are you using an Adj gas block?

[keystone183]

The main reason not to use adjustable gas if you don't need it is port erosion.

You just took an open port and put a choke over it, turning it into a combination chamber rather than the outlet for a manifold. There are ways to counteract that with nitriding and other processes, but I personally don't use Adjustable Gas if I don't need it.

I am also curious regarding the physics here. Not saying it isn't a thing, just can't wrap my mind around the how. Also, what kind of accelerated erosion are we talking here? If my port starts at. 07,how many regulated rounds(roughly) before I'm at. 09? . 1?