I am doing some interesting searches while looking at information on your grail guns. I have learned a lot and not always about what I intended. Here's a new site to add to the sidebar, Accurate Shooter, filled with so much information and reading I stopped to share it here.
Or this article, from Ammoland, on corrosive ammo.
I even learned that Precision Shooter Magazine had gone out of business. I probably should have known that, but I always got those magazines used.