I just swapped my G-10 grips back on.
When I installed the aluminum grips I cleaned the threads and used blue Loctite. I shot about 30 rounds and noticed both grips were moving around. All screws were coming loose.
Tonight I took them off and looked at them. You can see the four holes for the locating dowels took a beating during firing once the screws started coming loose. A slight ovaling and a raised dimple on the flat surface from the hammering of the dowel.
Anyway, now when you put them on (prior to installing screws) you can move them around. That means all the force would now be exerted on the screws with no help from the dowels. Doesn't sound good.
The dowels hold the G-10 grips firmly in place prior to installing screws. Before I shoot it again with the G-10 grips, I'm going to try some Vibra-Tite VC-3 on the screws and check them often.
So, anyway, now I have $70 worth of scrap aluminum.
If the Vibra-Tite works on the screws, maybe I'll try filling the locating holes with something to tighten them up and give the aluminum grips one more try.