I have had issues with every single aluminum rail or set of rings I ever got. The reason being that my gunsmith/FFL is a cheapskate. The only rails and rings he buys and carries are chinese made aluminum junk.
EGW Rails and components are made in Pennsylvania btw. Not offshore, closer to the Jersey Shore than we are, I'll admit.
I have bought EGW rails too, but before that time I had already made the switch to the steel Warne rings. After my experience with 1 EGW rail I said never again.
I use Warne rings as well. a PITA to lap but doable.
The OP has spent close to $850 buying his scope, and now is going to use a $43 aluminum part to hold that investment, in addition to the rings ? On a rimfire or a 223, the only time you will notice the difference is if the gun were to fall over and take a knock. But on a 300WM ????
EGW's are a bit more than 43 bucks. Badger Ordinance and Nightforce are more than EGW but there is nothing wrong with close tolerance machined aluminum, especially hard (T8) and anodized.
I was actually surprised how hard it was to get a one piece rail for my savage in all the local gun stores. Several people tried to sell me rails for the old style flat rear receiver but on my short action it was obvious that the holes didn't line up. Then I noticed the mismatch in the curvature between the parts. I don't know if one can make the mistake of mounting a rail for a non accutrigger on one of the current actions. That is sure to be far enough off to cause a problem with zeroing. It just seems that it would be obvious that it was not the right part.