I use LLa and/or my homemade blend of lithium axel grease/parrafin @ 50/50, both at over 2000fps in my 303 Brit. I recently discovered a new ingredient that seems to make it even better. To about 8oz. of lube, I add 1 teaspoon of (no kidding here,) chicken fat! It seems to soften the lube and when the rifle is fired, all sorts of smoke and smells are present : automotive grease, smoky wax, and oddly enough, KFC ! Seriously though, I have never had leading with 3 different molds for the same rifle using my lube or LLA, regardless of boolit design.
" Better is the enemy of good enough"