I can't speak to the 6mm Loverins, but I can for the 7mm's. The 3rd mould I ever had access to was a Loverin 7mm. I didn't have bullet lube, a sizer or even GC's! I wrapped the bullet in plumbers teflon tape as neatly as possible and shot them from my ratty old '93 Mauser 7x57 with a light load of something fairly fast, Unique probably. Amazingly enough, they shot pretty good at 50 yards. I mean like 2" groups from a standing rest against a tree, which was all the "bench" I had at the time.
Point is, you'll never know until you shoot them! What works in one gun may or may not work in another.