Please find attached below, some details
The alloy needs to deform so it seals the barrel to gain maximum pressure to get velocity.
The coating must stay on alloy and assist with metal separation without coming off Lead/alloy.
Captured projectiles, show no damage from heat on rear end of alloy. That is especially useful with high energy loads as the Lead is prevented by the coating to be damaged by the heat produced by high energy powders.
I thought, that this would be useful for you to know about the properties of our coatings. These are two of the Hi-Tek-Lube Supercoats used to coat projectiles.
Left to right, Old Bronze, (new Colour) and Dark Green.
These projectiles are coated and baked with two very thin coats.
The above tests, are typical test results obtained with the coatings, when the coated projectiles are subjected to extreme deformation.
Note that flattened projectiles, one side is rough where it lay on the concrete when flattening, and coating, despite being severely damaged stayed put on surfaces.
Surfaces, that are smooth directly alongside, is where 8 pound hammer hit surfaces, which are flat and smooth.
No fracturing can be seen on damaged surfaces.
Sizing projectiles to correct diameter after coating, allows exact finished diameters to be produced, and no lubricants are required to size or to shoot with majority of applications.
Due to the extreme beneficial properties of the coatings, it stays put on alloy, even with use in most hostile applications to prevent Lead becoming in contact with Barrel.
There are many attempts to reproduce such results, and I have seen many, with just as many concoctions trying to invent the ideal coating/lubricant.